Monday’s N.L. games

Cubs 7, Astros 2: Mark Prior pitched five shutout innings in his third start since coming off the disabled list and Todd Walker homered twice as Chicago ended Roger Clemens’ unbeaten start with a win in Houston. A highly anticipated pitching duel between one of the game’s most enduring stars and one of its newest was surprisingly lopsided in favor of the Cubs’ 23-year-old All-Star.

Prior (1-1) allowed only five hits and struck out eight, denying his childhood idol a chance to become the first pitcher in the big leagues with 10 wins. Clemens also could have become the first Astro to start the season 10-0 since Juan Agosto in 1988.

Walker went 4 for 5 with homers in the sixth and ninth and a triple in the third. He also scored four runs. The Cubs’ second baseman is now 14 for 29 in his last six games after going 0 for 13 in his previous four.

Phillies 10, Reds 7: While Ken Griffey Jr. decided to wait at least another day to try for a milestone homer, Jim Thome hit his 400th to help Philadelphia to a 10-7 win over visiting Cincinnati.

The game was stopped three times by rain, with delays totaling 3 hours, 54 minutes, and ended at 2:06 on Tuesday morning. The game was called with Billy Wagner taking warmup tosses in the ninth.

Ryan Madson (4-1) earned the win and John Riedling (4-1) lost – both in relief. The Phillies used seven pitchers; the Reds six. There were 13 hits by each team.

Monday’s A.L. game

Indians 14, Orioles 0: Jake Westbrook pitched a four-hitter for his first major league shutout as Cleveland trounced visiting Baltimore for its fourth straight win.

John McDonald, getting a rare start and batting only .107, got a career-high four hits and Lou Merloni had two of the Indians’ eight doubles.

Cleveland scored seven times in the third inning and led 14-0 after five. Casey Blake drove in three runs.

The Orioles lost for the sixth time in nine games.