Schauffele, who entered Day 2 outside of the top 10, sunk two eagles that helped bring him to 11-under and one stroke ahead of Mexico’s Carlos Ortiz atop the Tokyo Olympics leaderboard.
Repeated weather delays interrupted the second round, though that didn’t stop Schauffele from finishing with a 63 on the day. As a result of bad weather, 16 golfers — including Japan’s Hideki Matsuyama, currently tied for third — were unable to finish Round 2.
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The 16 golfers who didn't finish the second round resumed play at 6:45 p.m. ET on Friday.
Olympic tee times for the third round in Tokyo was pushed back to about 8:30 p.m. to 10:18 p.m. ET.
Watch all the action from the Tokyo Olympics live on NBC
The Tokyo Olympics current leaderboard as it stands after round two:
Xander Schauffele -11
Carlos Ortiz -10
Hideki Matsuyama -9
Milto Pereira -8
Alex Noren -8
Sepp Straka -8