Kenley Jansen calls it a ''slow start'' to the season. Chris Owings hit a three-run homer off Jansen with two outs in the bottom of the ninth to force extra innings, and the Arizona Diamondbacks scored twice in the 15th to rally past the Los Angeles Dodgers 8-7 early Tuesday. The first matchup between the teams since the NL champion Dodgers swept their Division Series last October became the longest game in Chase Field history at 5 hours, 45 minutes.