McClanahan (forearm) will not return before the conclusion of the regular season, Marc Topkin of the Tampa Bay Times reports.
Wacha did not factor into the decision Sunday against Pirates, allowing two runs on four hits and four walks over 5.2 innings. He struck out five.
Jax (8-10) earned the win against the Red Sox on Sunday, allowing three hits and two walks while striking out five over five scoreless innings.
Simpson went 1-for-3 with two RBI and a stolen base in Sunday's 5-1 win over the Red Sox.
Loftin went 4-for-5 with an RBI in Saturday's 6-5 loss to Pittsburgh.
Tampa Bay designated Fraley for assignment Sunday.
Jensen is absent from the lineup for Sunday's game against the Pirates.
Pasquantino is absent from the lineup for Sunday's matchup against the Pirates.
Tampa Bay reinstated Williamson (hamstring) from the 10-day injured list Sunday.
Caglianone went 2-for-3 with two walks, one RBI and two runs scored in Saturday's 6-5 loss to the Pirates.
