Callahan was released by the Giants in March, Baseball America reports.

EDGE Analysis

The 25-year-old righty missed most of 2019 with a shoulder injury. The only time he pitched in the majors was in 6.2 innings with the Mets in 2017.

Callahan (shoulder) was activated off the injured list at Triple-A Sacramento earlier in July.

EDGE Analysis

Callahan has allowed one run on four hits and has 11 strikeouts through his first five frames with the River Cats. The 24-year-old missed the first two months of the season due to injury before beginning a rehab assignment in mid-June.

Callahan (shoulder) signed a minor-league contract which includes an invitation to major-league spring training with the Giants on Friday, Bob Nightengale of USA Today reports.

EDGE Analysis

Callahan threw 6.2 innings for the Mets back in 2017, allowing four runs (three earned). He managed just 8.1 innings in 2018, all with Triple-A Las Vegas, before being shut down for shoulder surgery. The righty's readiness for spring training is not yet clear.

Callahan (shoulder) elected to become a free agent after getting outrighted from the Mets' 40-man roster Friday, Tim Healey of Newsday reports.

EDGE Analysis

Callahan underwent season-ending shoulder surgery in June after appearing in seven games for Triple-A Las Vegas. It's relatively unclear whether the 24-year-old will be ready to go for spring training at this point. In nine relief appearances with the Mets in 2017, he logged a 4.05 ERA and 1.20 WHIP with five strikeouts in 6.2 innings.

Callahan will undergo shoulder surgery, Betsy Helfand of the Las Vegas Review-Journal reports.

EDGE Analysis

Callahan, who has been on the minor-league disabled list since April 22 with a shoulder injury, will miss the remainder of the season after going under the knife. Prior to suffering the injury, the 23-year-old compiled a 9.72 ERA and 9:4 K:BB across 8.1 innings of relief.

Callahan was optioned to minor-league camp Tuesday, Matt Ehalt of The Bergen Record reports.

EDGE Analysis

The 23-year-old righty reached the majors for the first time last year, allowing three earned runs in 6.2 innings. He recorded a 2.94 ERA with 11.4 K/9 in 52 innings in the upper minors last season. With strong performances at Triple-A Las Vegas, he could return to the Mets' bullpen later this year.

Callahan was called up by the Mets on Friday.

EDGE Analysis

Callahan is set to make his major-league debut within the next few days as the 23-year-old earns his first promotion to the majors with roster expansion in full effect. During 10 innings with Triple-A Las Vegas since being traded to the Mets in late July, the right-hander has sported a 1.80 ERA and 1.60 WHIP over nine appearances. It seems unlikely that Callahan will get any high-leverage opportunities with the club, but should get some quality time on the mound as the Mets look to see what they have in him.