2026 MSBL Player Profile: Anthony Siderio, St. Lucie Adult Baseball League
By Steve LaMontia-Carlentini, MSBL Director of Communications
Anthony Siderio is a 45-year-old member of the six-team St. Lucie Adult Baseball League, an affiliate of the MSBL/MABL serving Florida’s St. Lucie, Martin, Okeechobee, and Indian River Counties. The league was organized and is managed by League President Frank Brown.
Anthony has always possessed the mindset that he wanted to coach. He still plays, but he understands the sacrifices that coaching requires.
“I always bat last, if at all,” explained Anthony, manager of the first-place Sharks. “Recently, at the MSBL Stars and Stripes tournament, I had two at-bats the entire tournament. But it isn’t about me.
Our team recently came over from another league that wasn’t being run very efficiently. Our team’s average age was 39, so we looked forward to the change and saw how we stacked up, even though it is also an 18-over league. Plus, Port St. Lucie is more centrally located for us than Palm Beach. It was time for a change.”
Anthony sells service contracts to medical professionals in Florida and was a sheriff’s officer in New Jersey before moving to Florida. He grew up in New Jersey, where he played ball alongside his dad in a local league. His brother continues to play in the Garden State.
“I took a couple of years away from the game when we moved to Florida, as my wife was battling cancer and I needed to help where I could. During this period, I lost a much-needed 30 pounds. I also got the itch to play again.
I was 42 or 43, saw a bunch of guys playing, and asked about their league. I then assembled my own team, which has evolved into the Sharks in the Port St. Lucie league.”
Anthony played in high school and was set to play college ball when he hurt his shoulder. He then went to work for a local recreation center, doing most everything.
“I hooked up with my high school coach and played into my mid-20s in a local league. I was able to play on my Dad’s team, which was special. All we did was play ball. We would play three games every Sunday!”
A shortstop by trade, Anthony’s days of covering the six-hole became more and more difficult as the years progressed.
“My picture belongs in some medical journal! I have had multiple arm injuries, a labrum tear (hip), I need elbow surgery, and I had a heart attack in October. I’m too young for all of this to happen, but it led me to primarily coaching, which I love.”
What is the best thing about the Port St. Lucie Adult Baseball League?
“It’s not a huge league, but there was a need for baseball in this area, and there are tons of guys who play slow pitch softball, yet have so much baseball experience. They don’t know we’re around. Once guys find out, the league will grow, and other leagues may come aboard. I am happy to be a part of Frank’s league and will promote it any way I can. The baseball future in this area is bright!” 
We asked Anthony who his favorite player of all time was. After hearing his answer, I understood completely.
“Mike Trout. He carries himself professionally in everything he does. I have always admired him. Plus, I went to his high school in New Jersey. I watched the MLB draft in 2009 with great interest.
Anyone who knew him back in the day is not surprised at his character and achievements. There will be quite a celebration when he makes the Hall of Fame, and he will.”
What is your greatest baseball moment?
“I was 23 years old and playing in a league around Philadelphia; it was the sixth inning, down 7-5, and I hit a three-run home run off the scoreboard. Then I closed out the last inning on the mound and was named All-Star MVP. That is a day I’ll never forget.”