MINNEAPOLIS -- After working out in warmer climates through winter, Minnesota Vikings wide receiver Charles Johnson (pictured) is back in the Twin Cities, for the start of the Vikings' offseason program. Over the weekend, though, he was one of 300 strangers who came together to brighten a little girl's day.

I was blessed and honored to meet and help celebrate Mackenzie Moretter birthday today! Thank u so much for having us pic.twitter.com/6iY2PnpQEx — Charles Johnson (@MrInkredibleXII) April 18, 2015

According to this KARE-TV story, Mackenzie Moretter of Shakopee, Minnesota, celebrated her 10th birthday with a party on Saturday. But in the days before the party, her parents had to act fast when they saw all of their invited guests had declined to attend.

When she was a year old, doctors found a tumor fused to her spine, and Moretter was diagnosed with Sotos Syndrome, a rare genetic disorder that causes gigantism (a condition where kids grow at a faster rate than normal). "Mackenzie is a lot taller than other classmates," Mackenzie Moretter's father, Matthew, told KARE. "Kids are friendly to her, but she doesn't have friends. No one calls and talks to her. I'll show up at her school and she will be playing alone."

So when Moretter's parents put out a call on Facebook for 10 people to attend the party, they got a wave of support in response. Shakopee mayor Brad Tabke proclaimed it "Mackenzie Moretter Day" in the Minneapolis suburb -- which sits just minutes from the Vikings' training facility in Eden Prairie. Firefighters allowed party-goers to tour their fire truck, retailers donated food and beverages for 250 people and Johnson attended the party with his family.

As trivial as offseason workouts can seem for players at times, they do have the effect of reuniting teammates and creating more opportunities for them to interact with the community in which they play. Johnson made wonderful use of one of those opportunities on Saturday.