Alex Rodriguez celebrates 'low-key' birthday with Justin and Hailey Bieber days after JLo wedding

A-Rod 'happy' for ex Jennifer Lopez as he is 'living best life' with new GF Kathryne Padgett

A-Rod took to Instagram and posted a short clip playing golf. In any case, the scene was pretty star-studded, according to a source who claimed that Ryan Smith, Justin and Hailey Bieber, Mark Wahlberg, Reese Witherspoon, and other celebrities were present at the ranch.

According to reports, A-Rod's girlfriend Kathryne Padgett was also present.

The Timberwolves' co-owner A-Rod later traveled to the Hamptons, where he was spotted hanging out with Patriots owner Robert Kraft. He was in the Hamptons with his daughters, a source claimed, adding that A-Rod and Kraft had been spotted eating at The Golden Pear.

The former Yankees slugger is "focusing on his businesses, the Timberwolves, parenting and a low-key lifestyle," according to an insider, who added that ever since his break-up from Lopez things have been low-key. Lopez recently wed Ben Affleck in Las Vegas, and according to reports, are planning a lavish bash to celebrate. Sources said that A-Rod appears content to be shielded from the media's attention.

Meanwhile, in a surprising development, Derek Jeter, who has a tense relationship with Alex, sent him an Instagram birthday greeting. In his recently released documentary series 'The Captain', Derek referred to Alex as "not a true friend." Even after 21 years, controversy still surrounds the complicated relationship between Jeter and Rodriguez. 

Nevertheless, Derek wished Alex Rodriguez a "Happy Bday" on July 27 despite their long-standing dispute. 121 people liked the comment.

At Yankee Stadium, Alex was seen with his older daughter Natasha. In order to watch the New York Yankees take on the Seattle Mariners, Alex and Natasha traveled to the Bronx.

Despite spending six years out of the MLB, the 14-Star All-Star still has a sizable fan base. With the Seattle Mariners (1994–2000), Texas Rangers (2001–2003), and New York Yankees, A-Rod participated in 22 MLB seasons (2004–2016). Currently, Rodriguez is the CEO of A-Rod Corp, a financial institution, and a part-owner of the Minnesota Timberwolves.