Former U.S. Olympic swimmer Michael Phelps has given further indication of a comeback by rejoining the U.S. Anti-Doping Agency’s drug testing program on Saturday.
The 28-year-old, who retired after winning four gold and two silver medals at the 2012 London Olympics, could return to competition next spring and be eligible to compete in trials for the 2015 World Championships.
Such a move would give him plenty of time to prepare for the 2015 world championships in Russia, a meet which will serve as a tune-up to the Rio de Janeiro Olympics the following summer.
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