SEATTLE -- Outfielder Guillermo Heredia and right-handed pitcher Casey Lawrence were recalled from Triple-A Tacoma by the Mariners on Tuesday, as the club placed pitchers Erasmo Ramirez and Dan Altavilla on the 10-day disabled list with shoulder issues.
Veteran left-hander Wade LeBlanc will move from the bullpen to take Ramirez's spot in the rotation, with LeBlanc's first start slated for Thursday's series finale against Oakland.
Heredia was optioned to Tacoma on April 22, and he wouldn't have been eligible to return until the 10-day window was up on Wednesday unless he replaced an injured player. With both Ramirez and Altavilla going on the DL, Seattle called up both him and Lawrence as the club opened a six-game homestand on Tuesday against the A's.
Ramirez has a strain in his right teres major, which is located in the shoulder. Altavilla has a strained AC joint in his right shoulder.
Manager Scott Servais said Ramirez likely will be shut down at least a month, while Altavilla's strain is believed to be less serious and he'll begin throwing again in 4-5 days.
Ramirez gave up a club-record-tying five home runs in his last start on Friday in Cleveland, and he has a 10.24 ERA in two starts since coming off the DL on April 22. Ramirez, who turns 28 on Wednesday, missed all of Spring Training and the first three weeks of the regular season with a strained lat muscle in his right side.
Ramirez said doctors told him his new injury isn't related to the lat strain, but he felt tightness in his triceps area as a reaction to the new issue while throwing a bullpen session Sunday in Cleveland. He didn't feel any problem during his last start, but acknowledged his fastball velocity hasn't been near his usual 92-mph range.
"For sure, I was trying to push as hard as I can and I cannot bring it even in the 90s," Ramirez said. "I don't know if that was the reason or not. When I was pitching, I felt great. I felt like I was throwing 92, but my velo was down. I don't know why."
Servais said Ramirez just hasn't looked the same as he did last year when he posted a 3.92 ERA in 11 starts after being acquired from the Rays.
"Not just the velocity, but the life on the ball hadn't been there," Servais said. "He did a great job after we acquired him last year and we had high expectations coming into the season."
Altavilla has posted a 4.38 ERA in 13 outings this season, allowing eight hits and nine walks with 16 strikeouts in 12 1/3 innings. The 25-year-old gave up two runs on two walks while getting just one out in Sunday's 10-4 win in Cleveland.
Heredia was sent down last week when the Mariners faced a numbers crunch with the return of Ramirez off the DL for his first start of the season in Texas. But general manager Jerry Dipoto said at the time that demotion would be temporary, as the club likes having the right-handed-hitting Heredia as an option in left field.
Heredia opened the year on the 25-man roster, and he hit .310 with a double and two home runs in 29 at-bats before being sent down. He batted .385 (5-for-13) with a double in six games for Tacoma, and he missed one game with a bruised knuckle after being hit by a pitch.
Lawrence pitched a pair of games in relief for Seattle early in the season, giving up five runs and four hits in 4 1/3 innings. The 30-year-old was 2-1 with a 2.45 ERA in 11 innings over three outings, including two starts, during his time with Tacoma.
He'll fill the long role in the bullpen now, while the 33-year-old LeBlanc moves back into the rotation as he did in 2016 with Seattle.
"That's why we acquired him, so if things like this came up we could slide him in there," Servais said. "One thing Wade always does is throw strikes. He's not going to beat himself. Your defense has to be on its toes, he's not going to strike out a ton of guys. But I think he'll be more than capable of filling in."