NEW YORK (AP) — Major League Baseball has managed to cut six minutes from the average time of a nine-inning game this season, when it adopted some speedup rules.STATS said Monday that the season average ended at 2 hours, 56 minutes. While the average dropped to 2:53 in the first half of the season, it was back at 3:00 after the All-Star break.MLB and the players' association agreed this year to enforce the rule requiring a hitter to keep at least one foot in the batter's box in many cases, and they also agreed to post stadium clocks timing pitching changes and between-inning breaks.Triple-A and Double-A leagues, the highest levels of the minors, used 20-second pitch clocks and started penalizing violators with balls and strikes.