Masters track is great cuz you can still improve year-to-year despite age. So I was thrilled to run the 50-meter dash Saturday in 8.31 at the Pasadena Senior Games (held at Cal State Los Angeles because Caltech’s track is said to be undergoing rehab). A year ago, I ran 8.56 at Caltech. So that makes up for my dropping out of the 100 after four steps (calf cramp, related to high jumping). Mastersrankings.com has results from the two-day meet (with javelin held at Occidental College because or artificial turf Sunday). Many entrants tried their feet at multiple events — since…