Naylor (shin/wrist) will start at first base and bat third Thursday against the Orioles.
Naylor missed the Mariners' last two games while dealing with a bruised shin and sore wrist, but both issues appear to have subsided ahead of Thursday's series finale. The 28-year-old has been heating up this month, slashing .250/.308/.500 with three homers, eight RBI and seven runs scored over 12 games since June 1.