Former Iowa State quarterback Brock Purdy has his share of believers and detractors. It seems much of the NFL landscape is still learning what it is that the San Francisco 49ers see in their former Mr. Irrelevant pick, even now heading into his fourth season with two trips to the NFC Championship and one to the Super Bowl on his resume. A former defensive teammate of his, Arik Armstead, a defensive lineman who is now with the Jacksonville Jaguars, asked Purdy’s receivers what it is about the small-time quarterback that makes him successful, where Jimmy Garoppolo underwhelmed and former No. 3 overall pick Trey Lance failed.