Steer (wrist) is scheduled to have a splint removed from his right wrist Monday, MLB.com reports.
Booser picked up a hold Sunday against Seattle, allowing one hit and no walks in a scoreless seventh inning. He struck out two.
Seymour (9-3) allowed one run on five hits and two walks while striking out seven over six innings to earn the win over the Mariners on Sunday.
Simpson went 4-for-5 with a double and a run scored in Sunday's 4-1 win over the Mariners.
Matz hit a batter but did not allow a hit or a walk in a scoreless inning to earn the save in Sunday's 4-1 win over the Mariners.
Diaz went 4-for-5 with one RBI and one run scored in Sunday's 4-1 win over the Mariners.
Singer (5-11) took the loss Sunday against the Nationals, allowing three runs on eight hits and a walk over six innings. He struck out three.
The Rays outrighted Wilson to Triple-A Durham on Sunday.
The Rays recalled Grove from Triple-A Durham on Sunday, Ryan Bass of Rays.tv reports.
Walls (back) will start at shortstop and bat ninth Sunday against the Mariners, Ryan Bass of Rays.tv reports.
