Boone had his first big game of spring training, going 3-for-4 with a double and three RBI to lead Florida to a 6-5 win Saturday over a New York Mets split squad.Boone's performance raised his average to .180. The Marlins aren't worried about the 34-year-old veteran, who signed a $925,000 contract to be their backup first baseman, a new position for him."He has been unbelievable," manager Fredi Gonzalez said. "He's a veteran guy. He plays like he's a 21-year-old trying to make a club. He's just a great guy to have around."Boone delivered a run-scoring single in the seventh inning to put Florida up 5-4 before Joe Borchard added a sacrifice fly.The Marlins overcame a shaky performance by Scott Olsen, their No. 2 starter. He allowed four runs and six hits in 5 1-3 innings. The Mets took advantage of his leg kick and stole four bases, prompting Gonzalez to say the left-hander will work on a slide-step move to hold runners closer."I wasn't really concerned with them running," Olsen said. "I was more concerned with where the ball was going. If you get the hitter out, they can run all day and they won't score. During the season I'll definitely pay more attention to it."Mets starter John Maine struck out the side in the first inning but allowed 12 hits and four runs in 5 2-3 innings. The right-hander threw 101 pitches.New York outfielder Lastings Milledge was hit in the left ribcage by a pitch from Felix Rodriguez in the seventh. Milledge rolled on the ground in pain, but stayed in the game after being examined by trainers.Milledge went 2-for-4 with an RBI but bounced into a game-ending double play with the potential tying run at third.