“The two teams will line up as follows for this afternoon’s contest:” The Pittsburg Dispatch, August 1, 1891, p9 (Used as verb)
“As seen by the line-up given below, Schoenhut is scheduled to do the pitching for the Varsity boys.” Philadelphia Inquirer, April 15, 1895, p6 (Used as noun)
Previous earliest use (Dickson Baseball Dictionary, 3rd edition, 2009):
1ST USE. 1905 (The Sporting Life, Oct. 7, p. 3; Edward J. Nichols).