Stanley Cup playoffs
It's postseason time in the NHL, which means the Devils are breaking in a new coach. When New Jersey fired Claude Julien last week and replaced him with team president Lou Lamoriello, it marked the second time that the team has axed its coach less than a month before the playoffs despite being in first place. The other time was in 2000, when they won the Stanley Cup behind Martin Brodeur (above). The 34 year-old goalie is still there, and he led the NHL with 48 wins this year. Check listings

De La Hoya--Mayweather 24/7
For weeks HBO's cameras have been trailing Oscar De La Hoya and Floyd Mayweather. The result is a four-part reality series that runs up to their May 5 megafight in Las Vegas. In tonight's episode the fighters open their camps and hit the road to promote the fight—which should appeal to fans of icy stare downs. HBO 10:30 p.m.

Boston Marathon
Suni Williams is one of more than 20,000 in this year's race, but she won't be climbing Heartbreak Hill with the rest of the field. A U.S. Navy commander aboard the International Space Station, Williams, 41, will run the race 210 miles above Earth's surface on a treadmill. (She'll be tethered to it with bungee cords so she doesn't float off.) Among the favorites on terra firma: defending champ Robert K. Cheruiyot, who broke the course record last year, and Deena Kastor, who's looking to become the first American woman to win since 1985. Versus 9:30 a.m.

Giants at Rockies
The Barry Bonds watch is on. Bonds (left) launched his first home run of the season on April 4, leaving him just 20 behind Hank Aaron's alltime record. A trip to the thin air of Coors Field—and some hacks against Colorado's staff—should move things along: Bonds has hit 51 career home runs against the Rockies, including 29 in 84 games in Denver. Check listings 8:35 p.m.

Masters Series Monte Carlo
Clay-court season is upon us, and no one is happier about that than Rafael Nadal (left). The Spaniard—who has won 62 straight matches on clay—has taken the last two titles in Monte Carlo. (Through April 23) Tennis Channel 4 a.m.


Who Really Owns Dallas?
The Mavericks have the inside track on the No. 1 seed in the West—but that's not necessarily a good thing. There's a strong chance that the eighth seed will end up being Golden State, the only team to have won the season series against the Mavericks for two years running. The Warriors, who are coached by former Mavs boss Don Nelson, have taken five of their last six from Dallas, and they'll go for a sweep of the three-game season series tonight in Oakland. Golden State is led by point guard Baron Davis (above), who is averaging 20.3 points and 8.1 assists. Check listings 10:30 p.m.