The Seattle Mariners optioned struggling catcher Jesus Montero to Triple-A Tacoma on Thursday, according to the Tacoma News Tribune.
Montero, 23, was hitting .208 with three home runs, and also hasn't played well defensively. The team recalled Jesus Sucre to replace Montero.
One of the top-rated prospects in baseball during his time in the minors, Montero batted .260 with 15 home runs and 62 RBIs last year with Seattle while logging time at catcher and designated hitter.
---The Texas Rangers released pitcher Derek Lowe on Thursday and signed infielder Mark Teahen to a minor-league contract.
Lowe, 39, cleared waivers and received his unconditional release. The righty posted a 9.00 ERA in 13 innings this season, and chose not to accept an assignment to Triple-A Round Rock.
Teahen became a free agent on Monday after being released by the Arizona Diamondbacks. He batted .211 in 22 games at Triple-A Reno.
---The Oakland Athletics activated shortstop Hiroyuki Nakajima from the 15-day disabled list on Thursday, and sent him to Triple-A Sacramento.
Nakajima is still coming back from a hamstring injury he suffered late in spring training. His 20-day rehab window expired Wednesday.
---Cleveland Indians pitcher David Huff was designated for assignment Thursday. The lefty allowed five earned runs in three innings with the Indians this season.
To fill the roster spot, the team recalled left-handed pitcher Scott Barnes from Triple-A Columbus. Barnes posted a 5.74 ERA in 15 2/3 innings this season with Columbus.
---The Philadelphia Phillies recalled reliever Michael Stutes from Triple-A Lehigh Valley on Thursday. The righty posted a 3.33 ERA and a 1.19 WHIP in 27 innings this season for the IronPigs. He will work in middle relief for the Phillies.