The TGL, which is aligned with the PGA Tour and founded by Tiger Woods and Rory McIlroy, features only Tour players, contrasting sharply with Mickelson's involvement in LIV.

Mickelson acknowledged that TGL could be beneficial for golf if it remains engaging, although he admitted it is too early to determine its long-term success.

His recent third-place finish at the LIV Golf Hong Kong event in early March 2025 marked his best performance in the league, coming just weeks before the Masters.

Mickelson praised TGL on social media, highlighting its potential to enhance the golf experience for fans by allowing them to see all the action, unlike traditional tournaments where spectators often miss key moments.

The inaugural season of TGL recently concluded with Atlanta Drive defeating New York Golf Club to win the SoFi Cup on March 25, 2025.

As he heads into the Masters, Mickelson expressed confidence in his performance, aiming to win both in LIV Golf and at Augusta.

Phil Mickelson's recent endorsement of the TGL, an indoor golf simulator league, is particularly noteworthy given his previous ties to LIV Golf and the ongoing rivalry between the PGA Tour and LIV.

He noted that while golf fans are loyal, the nature of the sport often requires them to move around the course, making it challenging to fully engage with the game compared to other sports.