The former Yankees player-turned-NBA owner kicked off the celebration at midnight on Tuesday at the Hôtel de Paris Monte-Carlo.
Alex Rodriguez celebrates 46th birthday in Monaco and Ibiza
Alex Rodriguez Celebrates His Almost-46th Birthday Splashing
Alex Rodriguez Embodies Santa Claus Spirit, Gives Back to
Alex Rodriguez rings in his 46th birthday in VERY lavish style
Alex Rodriguez works up a sweat during morning run in Ibiza
Alex Rodriguez Celebrates Birthday with Yankees-Themed Bash
Jennifer Lopez Celebrates Alex Rodriguez's Birthday at Concert
On His 40th Birthday, Alex Rodriguez Blows It Out With a Swing
Alex Rodriguez Celebrates His Almost-46th Birthday Splashing