Luis Castillo and Bryce Miller will both pitch Tuesday against the White Sox.

Instead of sticking with the six-man rotation, both Miller and Castillo will work multiple innings in the middle game of the three-game set against Chicago. What hasn't been announced yet is who will start that game, and assuming the starter doesn't go five innings, that hurler won't be eligible for a win. The Mariners could move back to the six-man rotation in the coming days/weeks, but for now, it appears the two will be piggybacking.