AKRON, Ohio — Zach Johnson shot a 7-under 63 on Saturday at rain-softened Firestone Club to take a four-stroke lead in the Kaulig Companies Championship, the fourth of the five major tournaments on the PGA Tour Champions.“It was for the taking today,” Johnson said. “It was wet. It was pretty much point and shoot and stop.”The 50-year-old Johnson has two victories in eight senior starts this season. He skipped the U.S. Senior Open last week to play in the PGA Tour’s John Deere Classic, where he tied for ninth.In cloudy conditions with a high of 83 degrees, Johnson played the front nine in 5-under 30 and added two birdies on the second nine. He had a 13-under 197 total after opening with consecutive 67s.“The front nine was as solid of nine holes as I’ve played in I couldn’t tell you how long,” Johnson said. Defending champion Miguel Angel Jimenez was second after a 62. The 62-year-old Spanish star shot his age for the first time.“Every time you can shoot your age is great,” Jimenez said.Third-round leader Cameron Percy was third at 7 under after a 70. Darren Clarke (68) and Tag Ridings (68) were 6 under.Johnson won the James Hardie Pro Football Hall of Fame Invitational in his first senior start and took the P …