SEATTLE -- Rookie first baseman Daniel Vogelbach, this season's winner of the Offensive Player of the Year Award for Triple-A Tacoma, was added to the Mariners' Major League roster on Tuesday as part of the club's September callups.
Outfielder Jacob Hannemann, who was claimed off waivers on Monday from the Cubs, has reported to the Mariners, and he will also be available for Tuesday night's game against the Astros. Seattle placed right-handed reliever Evan Scribner on waivers to grant him his unconditional release. He was on the 60-day disabled list and thus not on the Mariners' 40-man roster, which remains full.
Vogelbach, the Mariners' No. 11 prospect per MLBPipeline.com, will be joining the big league club for the third time this season. He hit .176 (3-for-17) with one RBI in seven games with Seattle in late April and May.
Manager Scott Servais said Yonder Alonso and Danny Valencia will continue to get the bulk of the at-bats at first base, but Vogelbach could get an occasional pinch-hit opportunity and will continue to work with the team on his defense.
"It's just good to be in a locker room in a playoff race with that atmosphere," Vogelbach said. "I was lucky enough to be up here last year [in September] and going through it was an awesome time. I'll just continue to take my ground balls and get better out there and just really observe and pick up things hitting wise as much as I can."
With Tacoma, Vogelbach posted a .290/.388/.455 slash line with 17 home runs and 83 RBIs in 125 games. The 24-year-old was a midseason Pacific Coast League All-Star selection, and he was also named Tacoma's Community Service Award winner.
Hannemann, 26, has never appeared in the Majors. He hit .240 with 57 runs scored, six homers, 32 RBIs and 29 stolen bases in 114 games between Triple-A Iowa and Double-A Tennessee in the Cubs' organization this year. With Jarrod Dyson battling a groin injury, Hannemann provides some center-field depth for the Mariners and could also be used as a late-inning pinch-running option.
Scribner opened the season in Seattle's bullpen, but he went on the disabled list in late April with a flexor bundle strain in his elbow after going 0-2 with an 11.05 ERA in eight outings. The 31-year-old made three rehab appearances for Tacoma in recent days, throwing three scoreless innings with one hit and one strikeout.
Scribner also missed considerable time in 2016 with a strained lat muscle, but he then threw 14 scoreless innings in 12 outings with the Mariners at the end of the season. He was acquired from the A's prior to '16 for right-hander Trey Cochran-Gill.
Greg Johns has covered the Mariners since 1997, and for MLB.com since 2011. Follow him on Twitter @GregJohnsMLB. This story was not subject to the approval of Major League Baseball or its clubs.