Right-hander Rob Whalen will push the Mariners into record territory when he starts Saturday against Boston at Fenway Park.
Whalen will be the 43rd different player used this season by the Mariners. Also their 27th pitcher and their 12th starting pitcher.
All are most in the majors for any club through 50 games since the millennium. (For that stat, credit research by master sabermetrician David W. Smith of www.retrosheet.com.)
The Mariners recalled Whalen on Wednesday from Triple-A Tacoma, where he was 0-2 with a 4.09 ERA in four starts after being activated April 27 from the disabled list.