John Calipari has faced a bevy of daunting coaching tasks during his 20-plus years as a head coach in college basketball and the NBA. He took a mid-major program at Massachusetts to the Final Four, bounced back from a termination with the NBA Nets, laid the foundation at Memphis and twice started over from scratch at Kentucky. But none of those coaching jobs can compare to the one he’s facing with the Dominican Republic National Team, Calipari said by phone Friday.