When Barry Zito sprained his right foot while fielding a buntApril 16, the Giants' regulars were Buster Poseyat catcher, Brandon Belt at first and Freddy Sanchez at second. Theoutfield, left to right, was Pat Burrell, Aaron Rowand and AubreyHuff. Zito is returning to a different team, though it remainsunequaled on the mound, thanks largely to the presence of RyanVogelsong, who replaced Zito and has, in Zito's words, "probablybeen the best in the league since he's come up. He's fun towatch." For the first time in 10 weeks, Zito will pitch for the San Francisco Giants - starting the nightcap oftoday's day-night doubleheader at Wrigley Field, and he'll befollowing the hottest man in the rotation, Vogelsong, who's workingthe opener. "He's been great for this bal