SAN ANTONIO — Andrew Bynum took another step toward his return to the Lakers’ active roster when he began running on a treadmill earlier this week. He had has no setbacks so far, according to an email team spokesman John Black sent to beat reporters today. Bynum’s first session on the treadmill was Tuesday.

Bynum suffered a torn medial collateral ligament in his right knee during a Jan. 31 game against the Memphis Grizzlies. He was originally expected to be sidelined for between eight and 12 weeks.

Lakers coach Phil Jackson made it clear Monday that he did not wish to give updates about Bynum, a 7-foot center who suffered a season-ending left kneecap injury on Jan. 13, 2008. Jackson said he would not talk about Bynum until next month.