EAST REGIONAL
Minnesota Duluth vs. Union, 2 p.m., ESPNU
UMD (22-10-6) has one of the top-scoring lines in college hockey with Jack Connolly (16 goals, 39 assists, 55 points) centering Mike Connolly and Justin Fontaine. The Bulldogs' power play has converted at 32.1 percent the past eight games. ... Union (26-9-4) is making its first tournament appearance; the Dutchmen of Schenectady, N.Y., moved up to Division I hockey 20 years ago. Kelly Zajac, brother of New Jersey Devils forward Travis Zajac, leads the team in scoring (13-29--42).
Yale vs. Air Force, 5:30 p.m., ESPNU
Yale (27-6-1) is the No. 1 overall seed in the tournament behind goalie Ryan Rondeau (1.83 goals-against average). Andrew Miller and Brian O'Neill both have 43 points for the Bulldogs. ... Air Force (20-11-6) is the No. 16 seed after winning the Atlantic Hockey tournament for the fourth time in five years. Jacques Lamoureux (24-20--44) is the Falcons' top scorer.
WEST REGIONAL
Michigan vs. Nebraska Omaha, 4:30 p.m. (ESPNU tape, 10:30 p.m.)
Michigan (26-10-4) is making its record 21st consecutive NCAA appearance. Carl Hagelin (18-30--48) of Sweden is the Wolverines' scoring leader. ... Nebraska Omaha (21-15-2) lost in the first round of the WCHA playoffs to Bemidji State and had to wait nervously for an at-large bid. Matt Ambroz (17-17--34) and Joey Martin (11-23--34) are the top two scorers.
Boston College vs. Colorado College, 8 p.m., ESPNU
Boston College (30-7-1) is the defending NCAA champion and also won the title in 2008. Three current players were on both those teams, including goalie John Muse, who is 8-0 in NCAA tournament games. ... Colorado College (22-18-3) has a handful of high-end forwards, including Stephen Schultz (16-27--43) and freshman Jaden Schwartz (15-27--42). Sophomore goalie Joe Howe of Plymouth has a 2.94 goals-against average.
