thespringleague.com
TSL mentioned positively in ESPN article "Why Shortening NFL Preseason Makes Sense" - The Spring League
“[…]players already are getting more reps than ever as coaches sideline their veterans. Plus, the sudden infusion of new leagues — #TheSpringLeague is headed into its 4th year of operation & the XFL will debut in February 2020 — provide a reasonable developmental structure.” Read full article here: https://www.espn.com/nfl/story/_/id/27347878/you-absolutely-need-four-preseason-games-why-shortening-makes-sense