What was the first tournament Phil Mickelson played after turning 50?

The Travelers Championship (25.06.2020 - 28.06.2020)

More about Phil Mickelson

At the 2020 Travelers Championship Phil Mickelson finished T24. He shot his best 2 rounds in over four months, signing for a first-round score of 64 followed by a 63, 71 and 71.

Philip Alfred Mickelson (AKA Lefty) was born on June 16, 1970.

He has won 44 PGA Tour events, including five Major Championships: three Masters titles (2004, 2006, 2010), a PGA Championship (2005) and an Open Championship (2013).

Mickelson is one of 12 players in the history of golf to win three of the four majors. Phil has won every major except the U.S. Open, where he has finished runner-up a record six times.