Before Jake Paul showed some big-time toughness in the ring vs. Mike Tyson on Friday ... he displayed his huge soft spot on Thursday -- sweetly hosting a boy who's battling cancer throughout some of his pre-fight festivities.
El Gallo's guest of honor was Owen Obey -- a 7-year-old who was diagnosed with bone cancer earlier this year -- and TMZ Sports has learned social media influencer Samuel Weidenhofer actually helped the two link up.