|Travelers Championship second-round leaderboard|
|-13 P Mickelson (US); -12 W Gordon (US), M Hughes (Can); -9 R McIlroy (NI), B Todd (US), M Leishman (Aus), X Schauffele (US), B Steele (US).|
|Selected others: -8 B DeChambeau (US); -7 D Johnson (US); -6 L Donald (Eng), J Rahm (Spa); -5 S Lowry (Ire), P Casey (Eng); -4 I Poulter (Eng).|
American Denny McCarthy withdrew from the Travelers Championship before the start of Friday's second round after testing positive for coronavirus.
England's Matt Wallace and American Bud Cauley, who played the first round with him, tested negative but Cauley also withdrew and Wallace missed the cut.
Their caddies all tested negative.
American veteran Phil Mickelson holds a one-stroke lead heading into the weekend in Connecticut after a seven-under-par 63 took him to 13 under.
American Will Gordon and Canada's Mackenzie Hughes trail the 50-year-old five-time major winner in tied second, with world number one Rory McIlroy four shots off the lead at nine under after his second-round 68.
However, Justin Rose missed the cut after a 73 on Friday took him to level par, as did fellow Englishmen Danny Willett and Matt Fitzpatrick and Scotland's Russell Knox.
McCarthy, 27, is the third player to test positive since the PGA Tour restarted on 11 June.
"I was feeling pretty tired and sore after the round yesterday but didn't think much of it because I had practised a lot Monday to Wednesday," said world number 180 McCarthy, who shot a first-round three-under-par 67.
"Last night, I woke up in the middle of the night with additional aches and soreness and sensed something was off."
Under the PGA Tour's response plan, 16 tests will be administered for those who had close contact with McCarthy.
McCarthy will self-isolate for 10 days, according to Tour protocols.
Cauley, who tested negative twice on Friday, said he withdrew "out of an abundance of caution for my peers and everyone involved with the tournament".
Nick Watney withdrew from the RBC Heritage after testing positive last week, while Cameron Champ did so at a pre-tournament screening before the Travelers.
World number four Brooks Koepka and Northern Ireland's Graeme McDowell also withdrew from the tournament in Cromwell, Connecticut as a precaution after their caddies tested positive.