The Englishman started his opening round without a driver and only received it on the third hole, although he shrugged off the mix-up to shoot a level-par 72.
"You have to see the funny side of it," said the 2013 US Open champion, who claimed back-to-back wins for the first time in his career in the Scottish Open on Sunday.
"I had three drivers in my bag after yesterday. There were a couple of drivers made up for a couple of my caddie's friends. Two were taken out and given to these two gentlemen and one was left in my golf bag. It just was the wrong one.
"This morning when I picked up my bag there was a driver in the wrong spot. I picked it up and realised that's not my shaft. That club should have been given to someone else and mine was actually given to that person and driven down to Bedford.
"Fortunately it didn't affect the gameplan. Obviously when we made the call, the guy was coming straight back with it and I knew I would have it by the time I really, really needed it out there, toward the seventh and the back nine. The way the course was playing I knew I wasn't going to require the driver for a good couple of hours into my round.
"Even par always feels like a waste of five hours, really. I felt there was a lot of good stuff today and felt comfortable with my game early on, but ran out of a little bit of steam on the back nine, which was playing a little tricky and I had trouble with club selection off the tee."