51 53 54 93 | Philadelphia Flyer, Stoneman Douglas alumni, Shayne Gostisbehere invites Stoneman Douglas students to Flyers game, January 25, 2018

In case the connection with the Stoneman Douglas shooting and Philadelphia wasn't already clear, this should help.

Rizzo, #44.  Shooting = 44
Gostisbehere, #43.  Shooting = 53

93.

Talk about named accordingly...

http://www.sportingnews.com/nhl/news/stoneman-douglas-shooting-alum-flyer-shayne-gostisbehere-invites-hs-hockey-team-nhl-game/66ioemeqakop1ihe9c2hr0zre

Notice the Lightning won 5-1, on January 25, or 25/1.

251, the 54th prime; Stoneman Douglas = 54; 2/14/2018 = 2+14+20+18 = 54

And don't forget the pairing of 54 and 93.  Sun = 54

Also, that date...   1/25/18 = 1+25+18 = 44 (Shooting = 44)