ANAHEIM, Calif. -- Right-hander?Nick Tropeano?has elected to undergo Tommy John surgery to repair his torn ulnar collateral ligament,?Los Angeles Angels?general manager Billy Eppler announced Wednesday.Tropeano opted for surgery after considering more conservative treatments, including stem cell treatments, Eppler said. He will be the second Angels starter this season to have Tommy John surgery.?Andrew Heaney had Tommy John surgery in July, and C.J. Wilson hasnt pitched all season because of various elbow and shoulder injuries and was shut down July 5 to have shoulder surgery.Nick has decided to undergo UCL construction, so he will have Tommy John surgery, Eppler said. Were still working on the date, but that will be in the near future. Right now, hes still deliberating over a couple physicians, and well make that announcement when it comes to light.Also Wednesday, Angels ace Garrett Richards will continue stem cell treatments on his injured elbow after seeing positive results.Richards is still confident that he will not need surgery to repair his torn UCL after he was cleared to begin the next stage in his recovery. An imaging appointment with Los Angeles-based physician Dr. Steve Yoon showed continued healing in the injured ligament.The next course of action now will be to test the elbow and also to put him through some exercises, Eppler said. In about 10 days to 14 days, hell have a follow-up ultrasound, and it will determine if he can pitch.If further progress shows in the next round of imaging, Richards will be cleared to start a throwing program. He could potentially face live hitting as soon as September or October. Eppler said they are considering the Arizona Fall League or instructional league, but he will not pitch in a winter league.I think that you still want to have him end this year and go into the winter with the feeling of having some answers, some questions answered, and not having to wonder if he will pitch and so on and so forth in spring training, Eppler said. So I think if we can get him back up on the mound and get him pitching in a competitive environment, I think we would like to see that happen and I think Garrett will as well.Richards echoed Epplers sentiments.I think its a must, I dont think theres any way I can not get into a competitive setting before this season is over, Richards said. I need to get off a mound and throw 90-95 percent for several pitches and full comfortable not only with myself, but make sure that my stuff is still there. Then Ill feel comfortable going into the offseason with what I have going.The Associated Press contributed to this report. 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Durant finished with 24 points and 13 rebounds, Jackson matched his career high with 23 points on 10-of-14 shooting and Lamb scored 12 points on 5-of-7 shooting, lifting the Thunder to a 94-88 win over San Antonio and snapping the Spurs 11-game winning streak. Buffalo Bills?running back LeSean McCoy will miss Sundays game against the Miami Dolphins after injuring his hamstring in Wednesdays practice, a source told ESPNs Josina Anderson.Bills coach Rex Ryan had said earlier Thursday that McCoy did not suffer a full blown hamstring injury and he was hopeful of having him back Sunday. The running back did not participate in Thursdays practice but watched part of the session from the sideline.Offensive coordinator Anthony Lynn wants to be cautious with McCoys injury. When Lynn served as running backs coach last season, McCoy strained his hamstring in training camp and the injury lingered into the regular season, keeping the star runner out of two games in October.I dont want to do what we did last year, Lynn said Thursday. Going in, playing 85 percent, reinjuring the hamstring and then this thing lingers all year. We just want to get him well and back on the field.In addition to McCoy, the Bills weere without top receiver Robert Woods (foot) and defensive tackle Marcell Dareus (hamstring) in Thursdays practice.dddddddddddd Tight end Charles Clay (ankle) returned to practice after sitting out Wednesday.Woods remained in a walking boot in the locker room Thursday, telling reporters that he is doing everything possible to be able to play Sunday but acknowledging that he has yet to test his injured foot in practice this week.I dont think theres a huge concern long term, Ryan said Thursday, adding that Woods has yet to be ruled out for the game.If the Bills are without McCoy, the team is expected to start Mike Gillislee at running back. Marquise Goodwin and Justin Hunter would be expected to take the majority of snaps at receiver if Woods cannot play.Information from ESPNs Mike Rodak was used in this report. ' ' '