As the Las Vegas Raiders wrapped up in the NFL draft on Saturday and selected players they’ll use to build toward the future, UNLV men’s basketball coach Josh Pastner couldn’t help but draw parallels to his own situation. With only five players secured on his roster for the upcoming season, Pastner still has his work cut out in the transfer portal. Upbeat as ever, Pastner used a metaphor to describe the nuances of the current basketball landscape. “(Recruiting) is a very inexact science. The NBA, NFL, MLB and the NHL spend millions of dollars in evaluating prospects for their draft process over years of time and probably only get it right 50 percent of the time,” Pastner told the Review-Journal on Saturday. “College coaches, you’re trying to make decisions on who you’re bringing to your team in two to three weeks, and those decisions will impact what your season does Nov.…