http://www.swingadvisor.com/GolfNews/Five-tied-after-two-rounds-in-Houston-Mickelson-misses-cut-1/ Colt Knost and Tommy Armour III shot 70s Saturday morning to tie Paul Casey, Geoff Ogilvy and John Senden for the lead at 8 under after two rounds of the Shell Houston Open. Sun, 05 Apr 2009 06:37:54 EDT en