Flaherty (forearm) was reinstated from the 15-day injured list Sunday and struck out one batter while allowing one hit and no walks over two scoreless innings in the Tigers' 4-2 loss to the Pirates in the season finale.
The Tigers optioned Hurter to the rookie-level Florida Complex League on Sunday.
Madden tossed three scoreless innings of relief with three strikeouts in Sunday's 4-2 loss to the Pirates.
Valencia went 1-for-4 with a solo home run in Sunday's 4-2 loss to the Pirates.
Ryan (0-1) took the loss against the Pirates on Sunday, allowing two runs on three hits and two walks with three strikeouts over 1.1 innings.
McGonigle went 2-for-3 with a solo home run in Sunday's 4-2 loss to the Pirates.
Dingler is not in the starting lineup for Sunday's game against the Pirates.
Johnson will serve as the Athletics' opening pitcher for Sunday's game against the Astros, Martin Gallegos of MLB.com reports.
White went 2-for-3 with an RBI in Saturday's 13-2 loss to Houston.
Williams (upper body) is not in the starting lineup for Friday's game against the Astros.
