JOLIET – Paul Morimoto was a resident from 1956 to 1959 at Cook County Hospital.

It was less than ideal pay, so to help bring in more money, he moonlighted in 1958 as a team physician for the Chicago Cubs. Ten years later, his son, David Morimoto, became a Cubs fan.

And just like dad, David entered the medical field. David is an ophthalmologist in Joliet.

In February, David’s staff submitted a montage video to the franchise of David’s fandom as part of the Cubs Championship Ring Bearer Contest, which gives die-hard fans the opportunity to present a World Series championship ring to a Cubs player at a pregame ceremony April 12.

David was one of 20 ring bearers chosen from more than 1,500 submissions.

“I’m so excited. I can’t wait," David said Wednesday. "It was a complete surprise to me."

One of the office receptionists saw a story about the contest, and it was her idea to submit a video of David. The staff was on board.

A surgical technician at the office who sings in her free time came up with the montage video to a Sir Mix-A-Lot song.

“She put the words to the tune on her lunch break,” David said.

Then, an optometrist synced it all together. They submitted it in February on Twitter.

The optometrist, Jeff Harris, was the only staff member with a Twitter account. But last week he hadn’t been on Twitter for a couple of days, so the Cubs had trouble contacting him.

“The Cubs organization called my office trying to track him down,” David said. “They got through to him last Tuesday, and I found out about it at the same time. It was so perfect.”

David went to Cubs games as a child with his parents. He was able to attend a World Series game with his parents, brother and nephews.

“I got my dad to one of the World Series games this past year, and he’s going to be my guest at the ring ceremony,” David said.

His favorite Cub of all time is Ernie Banks. David said he does not yet know who he’ll present a ring to, but he’s hoping for Javier Baez.

Although he was optimistic from the moment the Tribune Co. sold the team to the Ricketts family in 2009, and even moreso when they hired Theo Epstein as president of baseball operations in 2011, David said he never expected a World Series championship so soon.

“I thought it’d be a couple more years. I really didn’t think it would happen, until the final out of Game 7,” David said.

The ring ceremony is scheduled for the second home game of the 2017 season. It's a Wednesday night game against the Los Angeles Dodgers, who the Cubs defeated to get to the World Series.