Are the hens related to him? They’re likely to be carrying the genes for leakage. Males show it more extremely than hens do.
that’s not a horrific amount of leakage, considering how bad it can get sometime. If you can get a male without leakage, that'd be best, but if you choose to keep him you’d just have to be vigilant in his sons. Cull any with bad leakage, and try to select one with less leakage than he has or no leakage.