McClanahan (forearm) will not return before the conclusion of the regular season, Marc Topkin of the Tampa Bay Times reports.
Tong (2-2) took the loss Sunday against the Phillies, allowing four runs on five hits and four walks over 4.2 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.
Tampa Bay designated Fraley for assignment Sunday.
Tampa Bay reinstated Williamson (hamstring) from the 10-day injured list Sunday.
Nunez earned the save in Friday's 6-3 win over Philadelphia, tossing 1.1 scoreless frames.
Thornton (5-5) earned the win against the Phillies on Friday, allowing two runs on five hits and one walk while striking out four across six innings.
Soto went 3-for-5 with a double and a three-run home run during the Mets' 6-3 win over the Phillies on Friday.
Cleavinger (forearm) is expected to resume mound work Saturday, MLB.com reports.
