Muñoz keeps Byron Nelson lead with local star Spieth 1 backSebastián Muñoz is atop the leaderboard again at the Byron Nelson after shooting 66.
Palmer shoots 62, joins lead at low-scoring Byron NelsonRyan Palmer shot a 10-under 62 on Friday at the Byron Nelson for a share of the second-round lead with Sebastián Muñoz and 40-year-old tour rookie David Skinns.
