Monster Energy Supercross: Defending supercross champion Ryan Villopoto looks to guard his title from former supercross victors Chad Reed, Ryan Dungey and James Stewart for the second race of the 17-race season at Chase Field.
DETAILS >> Doors open for practice and qualifying at 12:30 p.m. Saturday; main event is at 7 p.m. Saturday. Chase Field, 401 E. Jefferson St., Phoenix. $10-$70. (800) 745-3000 or www.supercrossonline.com.