Bayer Leverkusen on Saturday became the first team in Bundesliga history to go through an entire season unbeaten after a 2-1 home win against Augsburg extended their undefeated streak in all competitions to 51 games.Eintracht Frankfurt came from two goals down to draw 2-2 at home with RB Leipzig, while Mainz came from behind to win 3-1 at Wolfsburg. dwi/dj