Ahead of the season finale for NASCAR this weekend at Phoenix Raceway, President Steve Phelps and Chief Operating Officer Steve O’Donnell held a press conference regarding the current state of the sport. One of the topics the duo tackled was the issue of some major star-power leaving the sport. Martin Truex Jr. will retire from full-time Cup Series racing at the end of Sunday’s race in Arizona, while Tony Stewart, a fellow championship driver turned one of the top owners in NASCAR, will be walking away, as well. CLICK HERE to go to PrizePicks and use code ON3 to receive a guaranteed $50 once y…