Christian Walker not in Arizona's Sunday lineup

Arizona Diamondbacks infielder Christian Walker is sitting Sunday in the team's game against the Seattle Mariners.

What It Means:

Walker is being replaced at first base by Pavin Smith against Mariners starter Chris Flexen. Stuart Fairchild was also optioned back to Triple-A.

In 368 plate appearances this season, Walker has a .234 batting average with a .668 OPS, 7 home runs, 43 runs and 37 RBI.