In my humble opinion I think you are misreading the situation. I heard that comment also and I don't think Grossman sounded cocky or lackadaisical at all. That's kind of how he is. Like others have said, pitchers need spring training more than the hitters. The way playing time is divvied up in spring, 10 at bats (or thereabouts) may mean two weeks' worth of games. That could be Grossman's way of saying he's ready by mid-March, which doesn't sound so far-fetched. And actually, Gladden did circle back a couple innings later to say "no way a player only needs 10 at bats"