Marlins add Austin Slater, bolster lineup vs. left-handed pitching

MIAMI, FL — Less than 24 hours after it was reported that the Miami Marlins agreed to a one-year major league deal with right-handed hitting outfielder Austin Slater, he took the field for his new team in a workout at loanDepot park.

"Really excited to have Austin join our club," said Marlins manager Clayton McCullough on Wednesday. "Saw him for a number of years as an opponent and he'll bring a real high quality at-bat versus left, something that historically he's done. Expect him to start versus left, also be a real weapon off the bench versus left-handed relievers. He's got the ability to play very solid defense in the outfield as well. We think this really rounds out our roster nicely and provides myself with a lot of options, and someone that has done this for a very long time at a high level."

To add Slater to their 40-man roster, the Marlins placed starting pitcher Adam Mazur on the 60-day IL as he underwent Tommy John surgery earlier this month.

For his career against left-handed pitchers, Slater has slashed .267/.357/.430/.787 with 30 home runs and 112 RBI. With the White Sox, Slater did post a wRC+ of 100 (right at league average), but it was his Yankees tenure that dropped his overall wRC+ to 78 on the season. He owned a .726 OPS against left-handed pitching this past season between both organizations.

This offseason, Slater signed a minor league deal with the Detroit Tigers and in 15 spring training games, he slashed .267/.389/.467/.856 with one home run, four RBI and a 126 wRC+. Despite the strong spring, Slater was informed that he did not make the Tigers Opening Day roster and triggered his opt-out. Slater described the last couple days as "a lot of chaos."

"I was able to go home for a little bit, so that was nice and relaxing," Slater told the media. "See my son and my wife and my parents, kind of get re-grounded, and now it's time to go. Kind of a quick reset. Luckily, it wasn't too long. Still feel like I'm in baseball shape and ready to go."

Prior to the Slater signing, the Marlins player with the most MLB service time was Sandy Alcantara (seven years and 100 days). Pete Fairbanks, who the Marlins signed this offseason, was the oldest player on the roster at age 32. Slater now takes over as the team leader in both categories.

"Being on a young team and being able to help guys out in any way I can, whether it's tips or just mindset or whatever it might be, I find that really exciting," Slater said. "Then also just the opportunity to play and contribute on a big league team. Those were key factors, and I had a familiarity with (general manager) Gabe Kapler here and his time in San Francisco, and he helped me a ton in my career. I'm hoping to make some adjustments and keep going."

Defensively, Slater has always been either league average or just about league average in the outfield. Although he's been used most often in center field in the past, most of his time with the Marlins will be spent in the corner outfield spots, with Jakob Marsee handling center.

The Marlins are set to face two left-handed starters this weekend in Kyle Freeland (Friday) and José Quintana (Sunday). Slater is highly likely to be in the lineup for those matchups.

"I don't think we're going to need to ease him in," McCullough said. "He was in camp the whole time and had a few days off, but he'll have a chance today to get a little bit of work, moving around some today and tomorrow. He will have the chance to get some work and get some at-bats, and he'll be ready for Friday."