Troy Trevor Tulowitzki (pronounced /ˈtuːləwɪtski/ or /ˈtʊləwɪtski/; born on October 10, 1984, in Santa Clara, California), nicknamed "Tulo," is a Major League Baseball shortstop for the Colorado Rockies.

Tulowitzki's arm, range and instincts at shortstop are highly regarded. Furthermore, his size, ability and leadership skills have garnered him comparisons to Cal Ripken, Jr., Alex Rodriguez and Derek Jeter.

Tulowitzki graduated from Fremont High School in Sunnyvale, California. He earned four varsity letters in baseball and two in basketball. He was twice named second team All-State in baseball and was a 3-time team MVP. As a junior, Tulowitzki had a batting average of .536. He also went 15-1 on the mound. As a senior, he batted .519 with 24 home runs. In basketball, Tulowitzki won league MVP, where he was second team All-State and team MVP, averaging 22.6 points per game during his senior year. He was named Fremont High Athlete of the Year in 2002.