In 1969 Twins manager Billy Martin elected to keep Walters on the team, and star player Bob Allison gave Walters the nickname "Big Shooter," which was later shortened to "Shooter." Walters pitched in six games in the major leagues, finishing with 6.2 innings pitched and a 5.40 ERA, 1 game finished, 6 hits, 4 runs, 4 earned runs, 1 home run, 3 base on balls, 2 strike outs and 1 hit batter.
In 1969 Twins manager Billy Martin chose to retain Walters on the team, and star player Bob Allison bestowed upon Walters the moniker "Big Shooter," which was later abbreviated to "Shooter." Walters made six appearances in the major leagues, compiling a total of 6.2 innings pitched and a 5.40 ERA, with one completed game, six hits, four runs, four earned runs, one home run, three walks, two strikeouts, and one hit batter.