Maton was optioned to Triple-A Lehigh Valley on Tuesday.
Maton hit .256/.323/.385 in 52 games as a rookie last year and should be a serviceable utility infielder if the Phillies need to call on him at some point this season. He doesn't have a spot to fill right now, however, with the Phillies electing to have both Bryson Stott and Alec Bohm on their Opening Day roster.