by Giants farmhands, while his .334 average was fifth. In 106 overall games he drove in career-best 79 runs. He was named to Cal League In-Season All Star team after hitting .357 with 13 HRs and 45 RBI for eventual league champion San Jose. He participated in the Venezuela Winter League following the campaign. After 10 seasons in minor league baseball, Alfonzo debuted with the Giants on June 3, 2006. During his debut, he hit a two-run home run against the New York Mets for his first major league hit. Three days later, he caught pitcher Jason Schmidt's 16-strikeout game, which matched a 102-year-old Giants franchise record. Alfonzo filled in for veteran catcher Mike Matheny, who was sidelined with symptoms following a concussion for the rest of the 2006 season. He hit .266 with 12 home runs, 39 RBIs and .465 slugging percentage in 87 games with the Giants. He again played in the Venezuelan Winter League. On June 3, 2006, Alfonzo made his big league debut. In his debut, his name was misspelled on his jersey (it should have ended in "zo," not "so"). Alfonzo hit a two-run shot in the sixth inning that ultimately won the game against the Mets. The following day, the jersey was still misspelled. In 2007, he batted a combined .325 with three homers and 15 RBIs in 23 games between Arizona League Giants and Triple-A Fresno. He had three homers and 10 RBIs in 18 games for the Grizzlies after batting .462 in five contests for AZL Giants. He hit .250 with a homer and six RBIs in 26 Major League games. Alfonzo drove in a career-best three runs against the Philadelphia Phillies on May 4. He batted .321 with eight homers and 45 RBIs in 56 games between the Class-A Augusta GreenJackets, Double-A Connecticut and Triple-A Fresno. He went 1-for-11 with an RBI in five games with San Francisco, he lost the competition for the backup catcher position and was sent back down to Triple-A. On May 1, 2008, Alfonzo was suspended for 50 games for testing positive for a performance-enhancing substance in violation of Major League Baseball's Joint Drug Prevention and Treatment Program. He became a free agent at the end of the season and signed with the San Diego Padres. San Diego Padres Alfonzo signed a minor league contract with the San Diego Padres and was sent to the Triple-A