Braves relief pitcher Jonny Venters will not throw at all for a period of four weeks after getting a platelet-rich plasma injection in his injured left elbow Tuesday. Venters, who was diagnosed with a sprained left elbow after leaving a spring-training game one week ago, was given the injection by Dr. James Andruws, a day after Andrews initially examined him at his clinic in Pensacola, Fla. Venters will be shut down for four weeks, after which he’ll begin a throwing program. The Braves didn’t give any time frame for his possible return from the 15-day disabled list and didn’t given any new information on the injury in a three-sentence announcement Tuesday. Andrews performed Tommy John elbow surgery to repair Venters’ torn ulnar collateral ligament after the 2005 minor league season, and he was sidelined for all of 2006. PRP is an emerging form of treatment to stimulate the healing of soft tissue without resorting to surgery and/or a longer recovery period. Braves pitcher Kris Medlen got a PRP injection during his rehabilitation from Tommy John elbow surgery after some scar tissue tore during the healing process.