Walker, Spieth tied for lead at Pebble

The playing group of Aaron Baddeley, Kenny G, Lucas Glover and Tom Dreesen make their way up to the sixth green of the Pebble Beach Golf Links during the second round of the AT&T Pebble Beach Pro-Am golf tournament on Friday, Feb. 7, 2014, in Pebble Beach, Calif. (AP Photo/Eric Risberg)

The playing group of Aaron Baddeley, Kenny G, Lucas Glover and Tom Dreesen make their way up to the sixth green of the Pebble Beach Golf Links during the second round of the AT&T Pebble Beach Pro-Am golf tournament on Friday, Feb. 7, 2014, in Pebble Beach, Calif. (AP Photo/Eric Risberg)

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