Alan Morris takes a look back at the past week's action and picks out two recent runners you need to put into your trackers. RIVER EDGE (C MASON) Chris Mason does a good job with home-bred sprinters and limited resources, and may soon find the right opportunity for River Edge. The 5yo gelding had three runs as a 3yo and after a season off has returned with three 5f runs at Chepstow in July, showing plenty of speed from the gate and not quite seeing it out. Keen holds have be