Washington Nationals outfielder Jose Guillen has a wrist injury that might require surgery and sideline him for three months. Guillen was examined early Friday by a hand specialist, who diagnosed swollen tendons and a damaged tendon in the left wrist. Guillen told the team he thought he hurt the wrist during weight training. The doctor recommended surgery to repair the damaged tendon, which would likely keep Guillen out of the lineup until June. The Nationals said they would seek a second opinion later Friday. Guillen was already questionable for Opening Day because of shoulder surgery in November, although manager Frank Robinson had been pleased with Guillen's progress during the first week of spring training. Guillen was hoping to return strong after fading in the second half of last season because of his ailing shoulder, which he hurt during a headfirst slide in June. He batted .283 with 24 home runs and 76 RBI.