Doug Fister, the 25-year-old right-hander who worked his first major league inning last night, will make his first big-league start for Seattle on Tuesday against the Chicago White Sox.
On the day Fister starts, veteran Carlos Silva - on the disabled list since May 9 - will throw his first bullpen session since being sidelined by inflammation.
Fister worked a scoreless inning in relief against Tampa, using his changeup and breaking pitch effectively. On Tuesday, he'll step into the spot vacated by lefty Jason Vargas, who's now in Tacoma.
Should Silva's bullpen session go well, barring a setback, the right-hander could pitch again this season, almost certainly in September, once the rosters expand.