Kind of Like a Promise

In order to prepare for unforseen circumstances in the summer tournament, Coach Kataoka has the players play out of their normal positions. Sawamura played left field in a practice game and Furuya played the infield during batting practice. Coach Kataoka asks straight-out if Yui, a first-year who made the first string, if he can play multiple positions. How will Yui, who has played catcher his whole career, respond?