Far from useless. You don't just toss away relievers who gets the swing and miss he gets.
I guarantee you if the Jays DFA'd him an organization like the Rays scoop him up immediately and use him as a weapon.
It’s irrelevant what was going to happen. Don’t reach your glove into the playing field. Its not hard. If you can afford those seats you can afford an 8 dollar Baseball from the store.