Detroit — With doubleheaders arriving about as regularly as pitching issues for the Tigers, they made two more moves Saturday ahead of a doubleheader against the Mariners that was to begin at 4:10 p.m. at Comerica Park.

Chad Bell, a left-handed, multi-inning option the Tigers had been using since last season, was designated for assignment to clear 40-man roster space for right-handed reliever Louis Coleman, a minor-league free agent who had been pitching well in 13 games at Triple A Toledo: 2.40 ERA, 0.87 WHIP, .157 opposing batting average.

Vacating the 25-man roster is right-handed reliever Johnny Barbato, who is returning to Toledo after he rolled up a 7.36 ERA in three outings for the Tigers.

The Tigers also took advantage of Saturday’s doubleheader by making a 26th-man roster addition, left-hander Ryan Carpenter, a move permitted on days when teams are obliged to play two games.

The Tigers and Mariners were washed out Friday and later Saturday, assuming rains moved out, were to play their fourth doubleheader of the 2018 season, all necessitated by ugly weather.

More: Your daily recap of Tigers' minor leagues (updated May 11)

Coleman, 32, has pitched in 213 big-league games, mostly with the Royals. He has a career 3.51 ERA and a 1.29 WHIP.

He is a drop-down, submarining thrower who was signed in February.

“It’s nice to have some of those (different) looks,” said Tigers manager Ron Gardenhire, who was set to start Matthew Boyd in Saturday’s early game, with Michael Fulmer working the second, which was to start 30 minutes after the first game’s finish. “Whether it’s a submariner or a guy who throws 98.”

Coleman spent all of 2017 pitching for Triple A clubs at Louisville and Reno, where, combined, he had a 2.25 ERA and 1.19 WHIP. He had Tommy John surgery in 2015, the season he last pitched in the big leagues.

He signed with the Dodgers ahead of the 2016 season and that season, after returning from Tommy John repairs, pitched in 61 big-league games.