- Card series: Beginnings: 1880's
- City: Philadelphia
- Team: Quakers
- League: National League
William Frederick Schriver (1865-1932) was a durable catcher for several mostly National League teams from 1886 through 1901. His debut for the AA’s Brooklyn Grays was his only stint outside the NL. Pop had a solid .264 lifetime batting average over a 14 year major league career. During his time with Cap Anson’s Colts, to promote a game with the Senators, battery-mate Clark Griffith made a 555’ “toss” to Schriver (off the Washington Monument). Accounts differ on Pop’s performance and Griffith later said Schriver dropped the ball. In any case, history has credited Gabby Street with the first successful accomplishment of the stunt, largely on the testimony of Griffith who by then was owner of Street’s Senators. In 800 games, Schriver made 720 hits in 2,727 at-bats.
- During 1894, the year of the D.C. feat, Pop was among the league leaders in most defensive categories
- In 1901 Schriver led the league in throwing out runners attempting to steal