Keuchel, who made $7.25 million last season, is in his second year of arbitration. The left-hander went 9-12 with a 4.55 ERA in 26 starts last year before missing the final month of the season with shoulder inflammation.
Marisnick appeared in 118 games last year, hitting .209 with five homers, 21 RBIs and 10 stolen bases, but he's considered the team's top defensive outfielder. With the signing of Norichika Aoki and Josh Reddick this offseason, Marisnick will be battling for playing time.
"It's good," Marisnick said. "I can focus on baseball, you know?