Michael will start at running back in Sunday's contest against the 49ers with Thomas Rawls on the Seahawks' inactive list.
Although Rawls (lower leg) was trending toward inactive status, he'll officially yield the top spot in Seattle's running back group to Michael for one game. Michael's preseason prowess has extended into the regular season, as he's averaging a robust 5.0 YPC on his 25 rushes through two games.