Zach Johnson, Jimmy Walker part of 4-way tie for lead at Kapalua

Nick Taylor, of Canada, hits off the first tee during the second round of the Tournament of Champions golf tournament, Saturday, Jan. 10, 2015, in Kapalua, Hawaii. (AP Photo/Marco Garcia) (The Associated Press)

Jimmy Walker waves to the gallery on the 15th green during the second round of the Tournament of Champions golf tournament, Saturday, Jan. 10, 2015, in Kapalua, Hawaii. (AP Photo/Marco Garcia) (The Associated Press)

Zach Johnson putted for birdie on every hole and made seven of them Saturday for a 6-under 67 that put him in a four-way tie for the lead after two rounds of the Hyundai Tournament of Champions.

Johnson was halfway home to becoming the first repeat winner at Kapalua who wasn't from Australia — Stuart Appleby and Geoff Ogilvy were the others. But not only is the first PGA Tour event of the year only through 36 holes, it's extraordinarily crowded.

Jimmy Walker dropped a stroke late and shot 67. Russell Henley got off to a sluggish start before a solid back nine for a 70. And Bae Sang-Moon closed with eight straight pars for a 69.

They joined Johnson at 11-under 135.

Five other players were one shot back.