Steve should be fine. 3 of the 4 clots are completely gone. That 4th one is dissolving, though at a slow rate. He goes back in for a doppler in May to see if the 4th clot is completely gone. We expect it to be. Once it's gone, he's off the thinners and, according to his hematologist here in Alabama, he'll be able to play.
As far as working out, he's pretty much participating in all of the workouts, with the exception being heavy squatting. Instead, he's doing a lot of leg presses, extensions, curls, lunges, etc. He's also doing a lot of sprinting (10s, 20s, 40s, 100s), and some distance work. His bench has improved immensely; he's past 450 and will likely get to 500 before the season starts.