Relegation-threatened Cologne claimed a dramatic late 1-1 draw in a Bundesliga six-pointer at Mainz, while lowly sides Borussia Mönchengladbach and Union Berlin played out a goalless draw on Sunday. Later on Sunday, Darmstadt can be relegated to the second division if they lose to Heidenheim. A goal from Leandro Barreira in the 29th put Mainz ahead after Karim Onisiwo made himself room for a shot, but his effort was pushed by Marvin Schwäbe, who couldn’t do anything to stop Barrerio on the rebound. Cologne had a huge chance to level the game early in the second half, but Luca Waldschmidt waste…