It is usually referred to as the nightcap.
My baseball team played a doubleheader
I've heard that it is 1 1/2 hour before the games on monday- Friday and 2 hours before the game Saturday - Sunday.
It's the FOX Sports afternoon doubleheader game, which will be shown to most of the nation at 4:15 p.m. EDT.
The Boston Red Sox won Game 2 of an October 2nd doubleheader with the New York Yankees, edging their American League East rivals 7-6 in 10 innings. The Yankees won the first game 6-5, also in 10 innings. The doubleheader was made necessary because rain postponed the October 1st game between the teams.
20 innings against the Boston Red Sox on August 29, 1967 with the Yankees winning 7-6. The game was the second game of a doubleheader.
twofold doubleheader
the 1961 Philadelphia Phillies, losing 23 straight from July 29th through the first game of a doubleheader on august 20th.
It was rescheduled as part of a traditional doubleheader in Oakland on Wednesday, May 7. Oakland won the makeup game, 2-0.
Yes
yes
sports.espn.go.com/mlb/stats/doubleheaders