47 Frankie Montas SP

Montas was sent down to Triple-A Nashville on Monday, Susan Slusser of the San Francisco Chronicle reports.

Oakland will roll with a four-man rotation with a slew of off days coming up, so Montas was returned to the minor leagues following a start in Colorado on Sunday. The club will require a fifth starter versus Seattle on Aug. 14, but it remains to be seen whether Andrew Triggs (forearm) or Paul Blackburn (elbow) will be ready to come off the DL. In the meantime, Montas will continue starting at the Triple-A level.

Montas (5-3) lasted just 4.1 innings Sunday, allowing three runs on six hits and two walks in the 3-2 loss to Colorado. He took the loss while striking out six and giving up a home run.

Montas allowed three earned runs for the third time in his last four outings, bumping his ERA up to 3.75 this season. He allowed a two-run homer off the bat of Tom Murphy in the second inning before Ryan McMahon drove in another run in the third. Montas will carry a 39:19 K:BB into Saturday's start against Detroit.

Montas allowed four runs (three earned) on five hits in five innings against the Rangers on Tuesday, striking out three and walking two in a no-decision.

Just called up from Triple-A Nashville, Montas threw 51 of 77 pitches for strikes and surrendered just two extra-base hits -- a double and a home run -- on the evening. Montas has now made nine starts on the year and sports a 3.54 ERA, 1.39 WHIP with a 33:17 K:BB in 53.1 innings. While his peripherals aren't great, he figures to remain in the rotation mix given the injuries to Oakland's pitching staff. His next start would be a matchup with the Rockies in Denver.

Montas was recalled from Triple-A Nashville ahead of Tuesday's start against the Rangers.

Few MLB starters appear more destined for negative regression than Montas, as he boasts a 3.35 ERA that is not supported at all by his 1.39 WHIP, 30:15 K:BB in 48.1 innings or his 4.56 xFIP. That said, he figures to stick in the big-league rotation for the time being.

Montas will take the hill against Texas on Tuesday, Jane Lee of MLB.com reports.

As expected, Montas will be called up from Triple-A Nashville on Tuesday to make his ninth start of the season in the big leagues. Through 48.1 innings with Oakland, he's logged a 3.35 ERA and 1.39 WHIP with 30 strikeouts in 48.1 innings. He will likely remain with the club following this start and get the call for Sunday's matchup with Colorado at Coors Field.