The 38-year-old athlete joined his former team, theNashville Predators, on the ice for a photo op alongside Isaiah ahead of the latter’s birthday (the youngster turns 4 on Wednesday).
“Thank you preds fans and@predsnhlfor an unforgettable night!” Fishercaptioned two snapshotsof the father-son duo, walking out onto the ice before flashing huge smiles with the Predators’ Roman Josi and Milan Lucic of the opposing team, the Edmonton Oilers.
“Izzy and I had a blast!#preds#hattrickpuckdrop#cheese,” added the proud dad. (The Predators ended the night with a victory, besting the Oilers in a close score of 3 to 2.)
John Russell/NHLI via Getty

One day earlier, Isaiah’s mamaCarrie Underwoodshowed off thefestive and elaborate Muppets-themed cake(courtesy ofIvey Cake) that she served at Isaiah’s special birthday celebration.
The sweet treat consisted of a giant replica of Kermit the Frog resting atop a cake shaped like the number 4, which was also covered in polka dots and various beloved characters from the Muppets franchise like Miss Piggy, Rowlf, Animal, Gonzo, Beaker, Fozzie Bear and the Swedish Chef.
Mike Fisher and Son Isaiah.Mike Fisher/Instagram

Alongthe base of the cake, a message proclaimed, “Happy birthday Isaiah,” along with a “MOST WANTED” stamp — a reference to the birthday boy’s favorite movie at the moment,Muppets Most Wanted.
“He wanted a ‘most dangerous frog’ cake and he most certainly got one!” explained the “Love Wins” singer, 35.
RELATED VIDEO: InsideCarrie Underwood’s New Life with a Family of 4: “They’re Total Homebodies”
Before herCry Prettytour kicks off in May, the American Idol alum is spending time with her family of four at home in Tennessee, enjoying every moment.
“They’re total homebodies,” asource previously told PEOPLE. “They rarely leave their home at night and love the outdoors and often go for walks.”
“Carrie lives a very quiet life. They take Isaiah fishing, to the zoo and tofarms so he can learn about animals,” added the insider. “They very much live a farm life and seem to love it.”
source: people.com