Jack Aker was traded to New York from Seattle early in the 1969 regular season for fellow-reliever, Freddie Talbot. Yankee manager, Ralph Houk used his new right-hander as the team’s closer the last four months of that season and Aker responded well to that role by winning eight of twelve decisions and earning 11 saves. He then followed that performance up with his best season as a Yankee in 1970, when he recorded 16 saves, won 4 of 6 decisions and posted a sterling 2.06 ERA. He was 16-10 during his three plus seasons in pinstripes with a total of 31 saves. He became expendable in 1972, after Sparky Lyle joined the team and when New York acquired Johnny Callison from the Cubs for a player to be named later in January of 1972, Aker became that player to be named later. His 32 saves for the lowly Athletics in 1966 led the American League. When he retired after the 1974 season, he had 123 lifetime saves.
|OAK (5 yrs)||19||20||.487||3.54||220||0||142||0||0||58||343.1||302||146||135||30||121||210||1.232|
|NYY (4 yrs)||16||10||.615||2.23||124||0||75||0||0||31||197.1||161||58||49||10||71||101||1.176|
|CHC (2 yrs)||10||11||.476||3.51||95||0||71||0||0||29||130.2||141||64||51||12||46||61||1.431|
|NYM (1 yr)||2||1||.667||3.48||24||0||16||0||0||2||41.1||33||18||16||4||14||18||1.137|
|ATL (1 yr)||0||1||.000||3.78||17||0||8||0||0||0||16.2||17||11||7||3||9||7||1.560|
|SEP (1 yr)||0||2||.000||7.56||15||0||9||0||0||3||16.2||25||15||14||4||13||7||2.280|