He didn't need it. He is 10-under par with a one-shot advantage over England's Richard McEvoy and former Vanderbilt player Matthias Schwab. Germany's Benedict Staben is also in the mix at 5-under-par.
Masters champion Patrick Reed (66) shared the fourth spot on 136 with Romain Wattel of France (69) and David Drysdale of Scotland (67).
DeChambeau is making just his second professional appearance in Europe, but looks comfortable on German soil. "I didn't have my A-game but I was able to miss it in the proper shots and leave myself some easy shots, so when I missed the green I could get it up and down", DeChambeau said. I didn't have my best stuff. "I thought I'd worked something out yesterday and it worked a little bit, but I've got to go back to the range and work a little harder". The two-time All-American is looking to earn playing rights for next season by finishing inside the top 110 on the European money list.
"I was missing in the right places today". "It's a really good position to be in".
Chelsea Finally Set World Record Price Tag On Real Madrid target
But Real's bid would give Chelsea another opportunity to get a sizeable fee for a player who only has two years left on his deal. Juventus striker Gonzalo Higuain could also make the switch to London after Cristiano Ronaldo 's move to Juventus.
"I'm flying on a bit of a cloud at the moment after winning on the Challenge Tour last week, and it's been a great first few days", McEvoy said.
Bryson DeChambeau remained a shot clear at the halfway stage of the European Open in Hamburg on Friday, while his fellow American Patrick Reed stormed into contention with a second-round 66.
"I felt like I could go into attack mode and attack some flags and my putter's working".
Having fought to make pars on many holes he had a stroke of luck at the 17th when his birdie putt hit the back of the cup and dropped - otherwise it would have raced several feet past - and he followed that by picking up another shot at the last to close on two under.