In coming weeks, it’s going to become clear that the prosecution of Roger Clemens boils down in many respects to two men: Clemens, the former star pitcher, and Brian McNamee, his one-time trainer and chief accuser.

Nedra Picker of the Associated Press wrote an interesting story that sets up a high-profile courtroom battle pitting former friend and former friend.

Clemens is charged with perjury, obstruction of Congress and making false statements when he testified before a House committee in 2008 that he had never used performance-enhancing drugs.

At those same hearings, McNamee testified that he had indeed injected Clemens with steroids and Human Growth Hormone.

Update: the slog of jury selection continued Monday morning. The judge, Reggie B. Walton, hopes to have a final panel of 12 men and women by Tuesday afternoon.

Through the morning, 23 potential jurors have been selected to be part of a final pool of 36 candidates from which the final 12 men and women will be drawn.