Rangers signed INF Mark Teahen to a minor league contract.
Teahen was granted his release from the Diamondbacks on Monday and became a free agent. The veteran infielder hit .211/.318/.254 in 22 games at Triple-A Reno and will continue to serve as organizational depth.
Ranges released RHP Derek Lowe.
Lowe cleared waivers and was granted his unconditional release. The 39-year-old right-hander posted a 9.00 ERA in 13 innings with the Rangers and will look to continue his career elsewhere rather than accept an assignment to Triple-A Round Rock.
Adam Eaton (elbow) underwent an MRI on Thursday.
The MRI didn't reveal any structural damage, so Eaton managed to avoid a serious setback. It's still going to be a while before he returns to the Diamondbacks. Eaton is expected to need 2-3 weeks of strength and conditioning before he's cleared to resume a throwing program.
David Ross (concussion) will begin a rehab assignment Thursday with Double-A Portland.
Ross has been out since May 11 with concussion-related symptoms. Assuming he avoids a setback, he'll rejoin the Red Sox for Friday game against the Indians.
Blue Jays prospect Sean Nolin is expected to start Friday against the Orioles.
A sixth-round pick in 2010, Nolin has a 1.17 ERA while striking out a batter per inning this year at Double-A New Hampshire. Chad Jenkins had also been a candidate, but will likely be sent down in a corresponding move. Nolin has made just six starts above the High-A level and is not a recommended streaming option in fantasy leagues.
Athletics activated SS Hiroyuki Nakajima from the 15-day disabled list; optioned him to Triple-A Sacramento.
Nakajima is still working his way back from a hamstring injury he suffered late in spring training. His 20-day rehab window expired on Wednesday, so the Athletics are keeping him in the minors.
Mariners purchased the contract of C Jesus Sucre from Triple-A Tacoma.
Sucre, 25, has a .302/.371/.321 batting line in 14 games as a part-time catcher at the Triple-A level. Mike Zunino still needs development time, so the Mariners are promoting Sucre to replace the struggling Jesus Montero.
Mariners optioned C Jesus Montero to Triple-A Tacoma.
Montero has been a major disappointment this season, batting just .208/.264/.327 with three home runs and nine RBI in 29 games. The Tacoma News Tribune reports Montero "may no longer viewed as a catcher at the big league level" and is expected play first base and DH in the minors. Mike Zunino will remain at Triple-A for now, while Jesus Sucre will replace him on the active roster.