FORT LAUDERDALE, Fla. (AP) -- Players' union leader Donald Fehr would consider approving blood testing for the human growth hormone if there was a valid, efficient procedure for determining its use over an extended period.

Fehr made the comments after meeting with the Baltimore Orioles, his first step in a planned journey to discuss union issues with all 30 major league teams.

Urine tests for performance-enhancing substances are administered under baseball's collective bargaining agreement, and HGH cannot be detected in current urine tests. The World Anti-Doping Agency says a blood test for HGH will be used at the Olympics, but no validated blood test for HGH currently is commercially available.

Such a test would have to be agreed upon in discussions between owners and the union.