Thielbar (back) has thrown several live sessions against hitters and could appear in a spring training game later this month, manager Rocco Baldelli told MLB.com.
Thielbar suffered a back strain early in training camp, but it looks like he has a chance to be ready for Opening Day. Thielbar's unique curveball (he didn't allow a hit the 94 times he threw it last season) and prowess against left-handed batters (.376 OPS allowed) could help him win a high-leverage role in the bullpen.