Phillies ace Cole Hamels is working to refine his mechanics after he was shelled for 11 hits and seven earned runs against the Rockies in his season debut. "It's about location, and location is arm slot," Hamels said. "A lot of it is timing, balance. When you're able to have the right timing and release it from the right [arm] slot, then I'll be able to create that angle I normally have. And, from there, everything just builds on it." Hamels is still on track to start against the Nationals on Thursday. "I put a lot of expectations on myself, and when I can't reach it, it's frustrating," Hamels said. "That's what I need, more repetitions. Having [bullpen sessions] back-to-back, it's not bad. It's just getting out there, throwing and throwing, just getting my muscle memory back."