Cardinals' quarterback Matt Leinart is trying to learn while Kurt Warner starts for the team, but it hasn't been easy for the former Heisman Trophy winner. "I'm a competitive guy, which is the hardest part," Leinart said Saturday. "But I think I'm getting better. I'm taking the time to up my game in every way that I can." Leinart started 11 games as a rookie under Coach Dennis Green, and Ken Whisenhunt made him the starter over Warner to begin last season. However, Warner took over and was named the team's starter to begin this year. "Matt's not playing because if you look through the first three weeks of the season, Kurt was as good as anybody in the league," Whisenhunt said. "He had one bad game, but you're not going to give a quick pull. You don't want to take Kurt out because a couple of fumbles, and some of them weren't his fault."