PALM BEACH, Fla. — The NFL is changing its sometimes controversial overtime rules to guarantee each side gets the ball in the playoffs. Concerned that the coin toss to begin the extra period has too much impact on postseason game results, the owners voted Tuesday to approve a proposal presented by the Indianapolis Colts and Philadelphia Eagles. Beginning this season, if the team possessing the ball first in overtime scores a touchdown on that series, the opponent still gets a possession. In recent seasons, that touchdown would have ended the game. The Titans had recommended that both teams possess the ball in overtime unless the team receiving the kickoff scores a touchdown and a 2-point conversion. That would end the game. But the owners, perhaps believing the Tennessee suggestion was too gimmicky, went with the other proposal. Under previous rules, the 10-minute overtime in the regular season only continued if the team getting the ball first failed to score or kicked a field g...