In what I see as the 2nd chapter of my professional running career since leaving the Mammoth Track Club 3 years ago, I’ve experienced some great highs and low lows. The highs of running 2:04 and making my 2nd Olympic team and the lows of having to DNF in the most important race and not making it to the starting line in others. I’ve gotten injured from training too hard while under a coach, and gotten injured from training too…