Arraez (hamstring) is starting at second base and batting in the cleanup spot against the Mariners on Monday, Scott Lauber of The Philadelphia Inquirer reports.
Arraez was not in the lineup for the Phillies' series finale against the Cardinals on Sunday due to hamstring cramps, though he did enter the game in the eighth inning. Through 20 games in August, he has a .291 batting average (23-for-79) with two home runs, five doubles, 11 RBI and 11 runs scored.