Both were listed/carried as "player manager" for their respective teams, not uncommon years ago; not so common these days.
Pete Rose was the last, Cinci Reds, 1986.
However, unusual because Cobb and Sisler made their mark as position players, not as pitchers. Cobb centerfield, Sisler 1st baseman.
[Note: Not to be confused with "player/coaches"]
Frank!