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New York Mets right-hander Kodai Senga was placed on the injured list on Saturday after exiting his season debut on Friday night because of a left calf strain. Mets manager Carlos Mendoza told reporters that it's a "high grade" strain and that Senga is likely done for the regular season. Senga suffered the injury when he ran off the mound to get out of the way of an infield pop up in the sixth inning against the Atlanta Braves

In other moves, the Mets recalled starter Tylor Megill, activated relief acquisition Ryne Stanek, and optioned reliever Eric Orze

Here's the injury. It's an innocent enough looking play, then Senga went down holding his calf:

Prior to the injury, Senga was terrific in his 2024 debut, holding the Braves to two runs on two hits and a walk in 5 1/3 innings. He struck out nine and had thrown only 72 pitches. Senga suffered a shoulder capsule strain in spring training and missed the start of the season. He allowed six runs in 13 innings in four minor-league rehab starts before returning.

The Mets lost prized rookie Christian Scott to a UCL sprain last week, and now Senga has a calf strain. New York was planning to use a six-man rotation with Senga -- Sean Manaea, Tylor Megill, David Peterson, Jose Quintana, and Luis Severino are their other starters -- so they still have five starters.

That said, losing Senga pushes the Mets to the limit of their pitching depth, especially with José Buttó proving so valuable in the bullpen. The club designated Adrian Houser, a viable swingman/spot starter, for assignment to clear a roster spot for Senga on Friday. They have veteran Joey Lucchesi stashed in Triple-A as depth, if necessary.

Of course, the trade deadline is Tuesday, so if the Mets intend to go outside the organization for pitching help, they have only so much time to do it. They're already in the market for bullpen help, even after adding Phil Maton and Ryne Stanek, and now perhaps a depth starter is on the shopping list. You can't have too many arms.

Senga, 31, threw 166 1/3 innings with a 2.98 ERA and 202 strikeouts his last season, his first with the Mets after spending 11 seasons with the Fukuoka Softbank Hawks in Japan. New York signed him to a five-year, $75 million contract last offseason.