Walker, 35, shared the news on his personal Twitter account on Tuesday evening. The infielder wraps up his 12-year major league career having batted .267/.338/.426 with 1,224 hits -- including 149 home runs -- in 1,306 total games between the Pirates, Mets, Phillies, Yankees, Marlins, and Brewers.

Walker cleared waivers after being designated for assignment late last week. The 35-year-old went 9-for-39 (.231) with three doubles and three RBI over 18 games with the Phillies this season.

Walker has managed just a .552 OPS in 18 games this season and it has cost him a spot on the roster. Ronald Torreyes will take his spot.

Walker was the only player on either the Phillies or Nationals to have multiple hits in the 3-0 game. The veteran infielder came into this one with just five hits and one RBI in 26 at-bats this season. He was playing first base tonight to give Rhys Hoskins a day off.