Baseball · Level 7: Upper-Advanced · Sub-level 7.2
The Reliever and the Closer
10 tests · 100 facts · updated 28 October 2026 · markdown
Relievers come out of the bullpen once the starter is done, and the closer is the one trusted with the final inning. Famous closers built careers on a single weapon: Rivera's cut fastball broke bats for nearly two decades, Hoffman's slow changeup fooled hitters into early swings, and Sutter's splitter dropped sharply out of the zone. Hoffman was the first pitcher to reach 600 saves, and Rivera received every Hall of Fame vote in 2019.
Life in the bullpen means watching the game until the phone rings, then warming up and entering, nowadays usually at a jog to the closer's entrance song. Hoffman's AC/DC bells signalled the ninth inning from 1998, and Metallica's song became linked with Rivera at Yankee Stadium. Short outings let relievers throw their best pitches all out and appear often, which is why some starters, Eckersley and Smoltz among them, thrived in the role. Since 2020 relievers must face three batters, which ended the era of the left-handed specialist.
Below are facts on great closers and their records, entrance music, relief in October, knuckleballers and submarine pitchers, and the numbers used to judge a reliever's season.
Each test below is ten questions on Insporta. The list under a test is what the questions check: one fact per question, with the source it was written from. Read it before the test, or come back from a wrong answer.
Test 1Famous closersTake a test
Rivera's cut fastball broke bats for nearly two decades.
Source: General baseball reference · recall
Hoffman's slow changeup fooled hitters into early swings.
Source: General baseball reference · recall
Fingers' moustache became his trademark with Oakland.
Source: General baseball reference · recall
Sutter's splitter dropped sharply out of the zone.
Source: General baseball reference · recall
Eckersley became the dominant closer for Oakland.
Source: General baseball reference · recall
Gossage threw multi-inning saves in the 1970s and 1980s.
Source: General baseball reference · recall
Wagner was elected to the Hall of Fame in 2025.
Source: General baseball reference · recall
652, 601 and 478.
Source: General baseball reference · applied
The 1970s, the late 1980s, then the 1990s and 2000s.
Source: General baseball reference · applied
An off-centre fastball grip makes a cutter.
Source: General baseball reference · applied
Test 2Entrance songsTake a test
Metallica's song became linked with Rivera at Yankee Stadium.
Source: General baseball reference · recall
The AC/DC bells signalled the ninth inning.
Source: General baseball reference · recall
Charlie Sheen's character entered to the song in the 1989 film.
Source: General baseball reference · recall
A familiar song builds energy in the ninth.
Source: General baseball reference · recall
Each hitter picks music for his trip to the plate.
Source: General baseball reference · recall
The song tells everyone a dominant arm is coming in.
Source: General baseball reference · recall
Fans link the song with the closer and the ninth inning.
Source: General baseball reference · recall
Gate, music, jog, warm-up.
Source: General baseball reference · applied
Hoffman's bells from 1998, Rivera's song from 1999, others later.
Source: General baseball reference · applied
Entrance music signals the closer's arrival.
Source: General baseball reference · applied
Test 3Relievers in the Hall of FameTake a test
The knuckleballer was elected in 1985.
Source: General baseball reference · recall
Rivera received every vote in 2019.
Source: General baseball reference · recall
Voters long saw relief work as less important than starting.
Source: General baseball reference · recall
Knuckleballs put little strain on the arm.
Source: General baseball reference · recall
Eckersley dominated as Oakland's closer.
Source: General baseball reference · recall
The Hall opened in Cooperstown in 1939.
Source: General baseball reference · recall
Hoffman was the first pitcher to reach 600 saves.
Source: General baseball reference · recall
1985, 1992, 2019.
Source: General baseball reference · applied
Retire, wait, vote, induction.
Source: General baseball reference · applied
Hall of Fame inductions take place in Cooperstown.
Source: General baseball reference · applied
Test 4Records in reliefTake a test
'K-Rod' saved 62 games for the Angels.
Source: General baseball reference · recall
Gagné's streak is the longest ever.
Source: General baseball reference · recall
Marshall won the Cy Young as a reliever that year.
Source: General baseball reference · recall
Orosco pitched in 1,252 games.
Source: General baseball reference · recall
Chapman's fastball was clocked at 105.8 mph.
Source: General baseball reference · recall
Rivera saved 42 playoff games.
Source: General baseball reference · recall
Short outings let relievers appear often.
Source: General baseball reference · recall
106, 62, then about 30-40.
Source: General baseball reference · applied
105.8, about 94, about 85.
Source: General baseball reference · applied
Chapman's 105.8 mph pitch was a tracked record.
Source: General baseball reference · applied
Test 5From starter to reliever and backTake a test
In one inning they can throw their best pitches all out.
Source: General baseball reference · recall
Smoltz closed for Atlanta, then returned to the rotation.
Source: General baseball reference · recall
Short outings limit the load while he learns.
Source: General baseball reference · recall
Starters must last much longer than one inning.
Source: General baseball reference · recall
No need to pace himself lets him throw harder.
Source: General baseball reference · recall
Eckersley's move to Oakland's bullpen made him a star.
Source: General baseball reference · recall
Facing each hitter once, a reliever needs less variety.
Source: General baseball reference · recall
He started, closed, then went back to starting.
Source: General baseball reference · applied
Short outings can unlock a pitcher.
Source: General baseball reference · applied
Some starters become closers later in their careers.
Source: General baseball reference · applied
Test 6Life in the bullpenTake a test
They watch the game from the bullpen until called.
Source: General baseball reference · recall
Bullpen cars carried relievers in the 1950s to 1990s.
Source: General baseball reference · recall
Arizona revived it, though most relievers still jog in.
Source: General baseball reference · recall
Seeing how hitters are pitched helps when they enter.
Source: General baseball reference · recall
He answers the phone and readies the arms.
Source: General baseball reference · recall
A reliever may be needed at any moment.
Source: General baseball reference · recall
He catches warm-up pitches but rarely plays in games.
Source: General baseball reference · recall
Watch, call, warm up, enter.
Source: General baseball reference · applied
Walking, then cars, then today's jog to music.
Source: General baseball reference · applied
Bullpen cars once drove relievers to the mound.
Source: General baseball reference · applied
Test 7Left-handed specialistsTake a test
LOOGYs faced one or two left-handed hitters.
Source: General baseball reference · recall
Lefties usually hit worse against left-handed pitchers.
Source: General baseball reference · recall
Since 2020 relievers must face three batters.
Source: General baseball reference · recall
Orosco's long career included many short outings.
Source: General baseball reference · recall
A wide arm angle makes the pitch seem to come from behind.
Source: General baseball reference · recall
He could face the opponent's best left-handed bat.
Source: General baseball reference · recall
Good lefties now get both left- and right-handed hitters out.
Source: General baseball reference · recall
Specialists, then the 2020 rule, then the new demands.
Source: General baseball reference · applied
Same-handed hitters are the easiest for a lefty.
Source: General baseball reference · applied
A low arm angle is hard for same-handed hitters.
Source: General baseball reference · applied
Test 8Relief in OctoberTake a test
Bumgarner, a starter, saved Game 7 on two days' rest.
Source: General baseball reference · recall
Playoff off-days let starters pitch in relief.
Source: General baseball reference · recall
Clubs push their best arms in elimination games.
Source: General baseball reference · recall
Gibson's pinch-hit homer off Eckersley won Game 1 in 1988.
Source: General baseball reference · recall
'Wild Thing' Williams was pitching for Philadelphia.
Source: General baseball reference · recall
Many playoff games are won or lost after the sixth.
Source: General baseball reference · recall
Herrera, Davis and Holland made games six innings long for rivals.
Source: General baseball reference · recall
1988, 1993, 2014.
Source: General baseball reference · applied
Warm up, enter, pitch long, finish.
Source: General baseball reference · applied
Bumgarner closed Game 7 in 2014.
Source: General baseball reference · applied
Test 9Knuckleballers and unusual relieversTake a test
A knuckleball is thrown softly without much spin.
Source: General baseball reference · recall
Dickey won 20 games for the Mets.
Source: General baseball reference · recall
Even the catcher cannot tell where the ball will go.
Source: General baseball reference · recall
A bigger mitt helps catch the erratic pitch.
Source: General baseball reference · recall
His knuckles nearly scrape the mound as he releases.
Source: General baseball reference · recall
Unfamiliar looks make short outings effective.
Source: General baseball reference · recall
The tall, thin Tekulve pitched from a very low slot.
Source: General baseball reference · recall
From straight overhead down to near the ground.
Source: General baseball reference · applied
Curves spin most; knuckleballs barely spin.
Source: General baseball reference · applied
A very low release marks a submarine pitcher.
Source: General baseball reference · applied
Test 10Reading a reliever's seasonTake a test
It shows how well he cleans up others' messes.
Source: General baseball reference · recall
One bad outing swings a small-innings ERA.
Source: General baseball reference · recall
It shows how often he loses leads.
Source: General baseball reference · recall
Strikeouts prevent runners from advancing.
Source: General baseball reference · recall
Shutdowns and meltdowns use win probability.
Source: General baseball reference · recall
It marks outings that cost the team badly.
Source: General baseball reference · recall
Leaving runners on base protects the previous pitcher's line.
Source: General baseball reference · recall
High-stakes escapes help most.
Source: General baseball reference · applied
ERA over few innings is noisy; walk rate settles slower than strikeout rate.
Source: General baseball reference · applied
Stranding inherited runners keeps them off the previous pitcher's line.
Source: General baseball reference · applied
Questions people ask
- Who are the greatest closers in baseball?
- Rivera, Hoffman, Fingers, Sutter, Eckersley, Gossage and Wagner are among the famous names. Hoffman was the first pitcher to reach 600 saves, and Rivera received every Hall of Fame vote in 2019.
- Why do closers have entrance songs?
- The song tells everyone a dominant arm is coming in, and a familiar tune builds energy in the ninth. Fans come to link the song with the closer and the final inning.
- What is a LOOGY?
- A left-handed specialist who faced only one or two left-handed hitters, since lefties usually hit worse against left-handed pitchers. Since 2020 relievers must face three batters.
- Why do some starters do better as relievers?
- In one inning a pitcher can throw his best pitches all out with no need to pace himself, and facing each hitter once he needs less variety. Eckersley's move to Oakland's bullpen made him a star.
- What is the fastest pitch ever recorded?
- Chapman's fastball was clocked at 105.8 mph, a tracked record.
- How do you judge a reliever's season?
- ERA over few innings is noisy, since one bad outing swings it. Inherited runners stranded, blown saves, strikeouts and win-probability measures such as shutdowns and meltdowns give a fuller picture.
- What is a submarine pitcher?
- A pitcher with a very low release, whose knuckles nearly scrape the mound. The tall, thin Tekulve pitched from a very low slot.
Sources
General baseball references, WBSC and league material, coaching manuals; original questions authored, nothing reproduced. Numbered rules belong to the Rules category.
- General baseball reference100