Just ice it anyway and take some ibuprofen as an anti-inflammatory. Warm up properly and limit your throws (throwing more will probably just aggravate it). Hold up on the long-toss if you’re doing a lot of that (every other day if your arm is fine), but if the pain starts to grow, you may have tendonitis like I have (I’m assuming you got that picture from my post). The prescription was just to rest, but knowing baseball players, you’ll want to do anything but that. Keep an eye on it, I’d say.