In consultation with the Cardinals and their performance department, Carpenter started a new arm-strengthening program that meant throwing earlier and longer this offseason. He, and presumably first baseman Paul Goldschmidt, have already felt the results of the work and what he now calls “a league-average arm.” Against Philadelphia this week, Carpenter went to his backhand and, moving away from first base, completed a clothesline throw that last year would have been a low-flying rainbow – with no out at the end of it. The chance to improve his arm came because of shoulder health and, for the first time in years, because he has a home in the infield, at third.