Paulina Gretzky and Dustin Johnson have second baby

June 14 (UPI) -- Golfer Dustin Johnson and Paulina Gretzky welcomed their second child Tuesday evening.

The name of the newborn baby boy has yet to be announced.

Johnson's grandfather Art Whisnant sent a photo of the new family addition to ESPN.

Gretzky, 28, is the daughter of 'The Great One' Wayne Gretzky. She is also a model with 612,000 Instagram followers.

Johnson is currently the No. 1 ranked golfer in the world. The 32-year-old missed the cut at the Memorial earlier this month. His last victory came in March at the World Golf Championships. He also won the Genesis Open in February and finished third in the AT&T Pebble Beach Pro-Am earlier this season.

ESPN and TMZ reported that the plan was for Gretzky to have a C-section and fly to the U.S. Open on Tuesday. TMZ reported that he already made the trip to Wisconsin.

Johnson is the defending U.S. Open champion. He is expected to tee off at the start of the 117th edition of the tournament Thursday at Erin Hills in Hartford, Wi.

The Johnsons welcomed their first child, Tatum Gretzky Johnson, in 2015.