William John Simmons III is an American podcaster, sportswriter, and cultural critic who is the founder and CEO of the sports and pop culture website The Ringer. Simmons first gained attention with his website as "The Boston Sports Guy" and was recruited by ESPN in 2001, where he eventually operated the website Grantland and worked until 2015. At ESPN, he wrote for ESPN.com, hosted his own podcast on ESPN.com titled The B.S. Report and was an analyst for two years on NBA Countdown.

Grantland was a sports and pop-culture blog owned and operated by ESPN. The blog was started in 2011 by veteran writer and sports journalist Bill Simmons, who remained as editor-in-chief until May 2015. Grantland was named after famed early-20th-century sportswriter Grantland Rice (1880–1954).