Harper (b. 1981) was a 45th round pick by the Mets in the 2000 June Amateur Draft out of Desert Mountain High School in Arizona. He played professionally from 2001 to 2013 and from 2015 to 2016. He spent time in the Mets, Giants, Blue Jays, Dodgers and A's systems. He also spent time in Mexico and Japan. He reached AAA in his time in the minors, but never cracked the majors.
In his 15 professional seasons (minors and foreign leagues combined), he had 1,349 hits, 232 home runs and a .299 batting average.
I mailed to Harper on February 11 and got the card back on February 28, for a 17-day TAT.