CLEVELAND, Ohio - Seattle running back Shaun Alexander, already playing with a cast on a cracked wrist, briefly left today's game against the Cleveland Browns with a sprained left knee and ankle. Alexander had five carries for 9 yards before getting hurt in the first quarter. He tested the injury on the sideline before heading to the locker room. Alexander sat out one series before returning in the second quarter. Coach Mike Holmgren says Alexander's knee stiffened up after getting twisted early in the game. Some X-rays will be taken. The NFL's MVP in 2005, Alexander has rushed for just 460 yards - his lowest total through seven games since 2002. He has two touchdowns after setting the league record of 28 two years ago. Earlier this week, Alexander complained the cast on his arm was too bulky and limiting him.