Top trader Najarian sees upside for Hain Celestial

"Halftime Report" trader Jon Najarian, up 14 percent in the CNBC PRO model portfolio competition, bought shares of Hain Celestial on Friday.

Meanwhile, Jim Lebenthal, the leader with a gain of more than 28 percent, trimmed his position in J.C. Penney.

Here's why they made the moves...