A fungo bat is a specially designed bat used by baseball and softball coaches for practice. The etymology of the word fungo ( /ˈfʌŋɡoʊ/) is uncertain, but the Oxford English Dictionary suggests it is derived from the Scots fung: to pitch, toss, or fling. A fungo is longer and lighter than a regulation bat, with a smaller diameter. The bat is designed to hit balls tossed up in the air by the batter, not pitched balls. Typical fungo bats are 35 to 37 inches (89 to 94 cm) long and weigh 17 to 22 ounces (480 to 620 g). Coaches hit many balls during fielding practice, and the weight and length allow the coach to hit balls repeatedly with high accuracy. The small diameter also allows coaches to easily hit pop-ups to catchers and infielders along with ground balls due to better control of the barrel of the bat.
It is not clear why pregame infield fell out of favor in the majors. Today, coaches hit balls to infielders and outfielders during batting practice. Most players go at it leisurely, lobbing balls back in or across the diamond. That rankles old-school players like Jerry Kindall, a former major league infielder who coached Arizona to three N.C.A.A. titles before retiring in 1996.
Maple bats in particular were once known (circa 2008) to potentially shatter in a way that resulted in many sharp edges, sometimes creating more dangerous projectiles when a bat broke. Maple bat manufacture evolved significantly, in cooperation with Major League Baseball, paying special attention to grain slope, and including an ink spot test to confirm safest wood grain orientation.
First-base coach Daryl Boston has been working Palka with fungo drills. — Phil Thompson, chicagotribune.com, "Yoan Moncada has untapped power from right side, Rick Renteria says," 23 May 2018 While the Angels took infield before the Texas finale Wednesday, Ohtani stood by the cage with a bat in his hand waiting for BP near where Scioscia was hitting fungo to some infielders. — Stephen Hawkins, chicagotribune.com, "Shohei Ohtani eager for more as Angels balance work for 2-way star," 12 Apr. 2018 And dad liked to take us to Lincoln Park and hit fungos to my twin brother, Javier, and me. — John Hickey, The Mercury News, "Adam and Will Rosales proselytize for baseball," 11 Apr. 2017 Since then, his only baseball activity has been hitting one-handed fungos to teammates in ground ball practice. — Nick Groke, The Denver Post, "Colorado skipper Bud Black faces the Padres with a new perch; Rockies still scanning Desmond, Dahl and Murphy," 10 Apr. 2017
For starters, we should clarify just what we’re talking about when we say fungo bat. Longer, lighter and thinner than a regulation bat (but a larger barrel), a fungo bat is typically 35 to 37 inches long, and weighs between 17 and 22 ounces. As David Allison wrote in the June 1978 edition of Country Journal, “A fungo bat looks to be a cross between a baseball bat and a broomstick.”