* Hoffman cards a 70 to stay out in front
* Lovemark alone in second after a 68
* Spieth slides backwards with a 73 (Updates at close of play)
April 1 (Reuters) - Charley Hoffman remained one stroke clear after the weather-hit second round of the Houston Open on Friday, despite bogeying his final hole, while Jordan Spieth endured a frustrating day to finish six shots off the pace.
One ahead of the chasing pack overnight, American Hoffman fired a two-under-par 70 to post a 10-under total of 134 in the final PGA Tour event before next week's U.