Hideki Matsuyama and Denny McCarthy share the lead at the FedEx St. Jude Championship, both reaching 11-under par after impressive rounds of 64 and 63, respectively. Matsuyama's performance included seven birdies against one bogey, even while dealing with the absence of his regular caddy due to a robbery in London. Sam Burns follows closely at 10-under after a strong start that saw him shoot a 29 on the front nine. World No. 1 Scottie Scheffler remains in contention at 9-under after a bogey-free 65. The tournament, critical for FedEx Cup standings, has seen other top players like Rory McIlroy and Jordan Spieth struggle in the oppressive heat. As the competition heats up, players are preparing for a challenging weekend ahead.