Shane Lowry is back on form at the Travelers Championship on the PGA Tour this weekend, as he heads into his final round tied for fifth place. The Irishman has bounced back from recent disappointments with a six-under-par 64 to follow up rounds of 68 and 65, leaving him in the top 5 heading into Sunday at the PGA Tour Signature Event. Lowry has Dermot Byrne on the bag this week after splitting with Darren Reynolds, who had been his caddie since …