ARLINGTON -- Center fielder Byron Buxton is not among Minnesota's first round of September callups, as the Twins announced that outfielder Johnny Field, catcher Chris Gimenez and relievers Tyler Duffey, Andrew Vasquez and Matt Belisle will join the club with rosters expanding on Saturday.
Field and Duffey will both be recalled from Triple-A Rochester, Gimenez and Vasquez had their contracts purchased, while Belisle will be activated from the 10-day disabled list. Gimenez was acquired in a trade with the Cubs for Bobby Wilson on Thursday, while Belisle had been out since Aug. 6, dealing with sore cartilage in his right knee.
With Eddie Rosario expected to be out roughly a week with a right quad strain, the Twins needed another outfielder, but went with Field over Buxton. Buxton, though, could still be recalled on Tuesday after Triple-A Rochester's season ends on Monday, although general manager Thad Levine was non-committal when asked if Buxton will be recalled.
"I think at this stage we want to keep the conversations about the five guys we're going to call up tomorrow," Levine said. "We'll definitely cover additional players as this series unfolds."
Levine said Buxton is still dealing with a sprained left wrist suffered in mid-July and that they're still working on who else will be brought up.
"I think he's been swinging the bat better clearly over the last couple of games," Levine said. "He's performed well down there. From a health standpoint, I think he's still progressing toward being healthy. But to his credit he's playing through it right now."
Gimenez gives the Twins a third catcher and a veteran clubhouse presence, as Gimenez and Belisle both played key roles as leaders on last year's team that made a run to the American League Wild Card game.
"I think it'll be helpful to keep everyone pushing even as the stakes have changed, if you will," Twins manager Paul Molitor said. 
Duffey, Belisle and Vasquez provide relief depth for the Twins with more help coming over the next few days. Right-hander Zack Littell is a candidate to be recalled and could even see action on Sunday as a starter or long reliever if they want to implement "the opener" strategy.
Vasquez, a lefty, posted a 1.30 ERA with 108 strikeouts in 69 1/3 innings in the Minors this year, throwing his slider more than his fastball.
"I think he's had a tremendous season," Levine said. "He has really developed. The strikeout-to-walk ratio has been exceptional and what he has worked on this season has been being effective against righties as well as lefties."