A.J. Puk is set to be one of the most important relievers for the Arizona Diamondbacks this year. Whether or not he will be a closer, Puk is arguably the most crucial arm in the bullpen for the team.

Entropy Technologies LP purchased a new position in Prudential plc (NYSE:PUK – Free Report) during the fourth quarter, according to the company in its most recent 13F filing with the SEC.