One year after players he treated were suspended from Major League Baseball, Tony Bosch winds up surrendering to federal authorities over his activities at Biogenesis.

Sources told “Outside the Lines” the federal investigation focused on:

• Whether Bosch acted in the role of a physician (he is not licensed as one).

• How the clinic obtained and administered human growth hormone, steroids and other drugs, as well as the source.

• And whether teenagers were provided performance-enhancing drugs.

And he thought MLB investigators were tough.