FORT MYERS, Fla. — A shaky afternoon on the mound quickly became a most memorable day for Shelby Miller.

The 22-year-old rookie pitched into the fifth inning, then found out he’d won the fifth spot in the St. Louis rotation as the Cardinals beat the Minnesota Twins 4-3 Monday.

Miller gave up one run and six hits in 4 1-3 innings. He struck out two and walked two.

Joe Mauer had two hits and a walk for the Twins, raising his spring batting average to .435. The Twins optioned catcher Drew Butera to Triple-A Rochester and reassigned catcher Dan Rohlfing, outfielder Brandon Boggs and infielders Jeff Clement and Ray Olmedo to minor league camp.

Twins manager Ron Gardenhire said barring a late change or injury, outfielder Wilkin Ramirez will make the 25-man roster as a bench player. Ramirez is hitting .415 (17 for 41) this spring with a team-best seven doubles.