Baseball formally required all batters to wear helmets in 1970. Red Sox catcher Bob Montgomery was the last player to bat in a Major League contest without a helmet in 1979. Then in 1983, it became mandatory for all professional players to use a helmet with at least one earflap, although anyone with Major League service time in 1982 or earlier could opt for a flapless helmet like Ozzie Smith, Dave Winfield, Tim Raines, and several others. Raines would be the last player to use a flapless helmet.

On April 7, 1979 Orioles outfielder Gary Roenicke was hit in the face by a pitch, causing a laceration that required 25 stitches to close. Roenicke returned to the lineup on April 15 at Milwaukee and went 3-3 using a helmet with a modified football facemask attached. Expos outfielder Ellis Valentine had his cheekbone fractured when he was hit by a pitch on May 30, 1980 at St. Louis. Valentine also returned to the lineup donning a similarly designed batting helmet equipped with a sawn-off football facemask. Folks who opened packs of Topps baseball cards in 1981 could find a pair of cards depicting each of these unique batting helmets.

Although no such picture appeared on any cards issued during his playing career, it is generally accepted that the first player to experiment with protective face gear was Dave Parker. Parker sustained facial fractures in a collision at home plate with Mets catcher John Stearns on June 30, 1978. Upon his return to the lineup July 16, Parker experimented with a (downright terrifying) hockey goalie mask and other football facemask designs. Despite his injury, Parker would win the batting title (.334) and be named National League MVP in 1978.

Most recently, Giancarlo Stanton made news when he returned to the Marlins in 2015 using a helmet fitted with a custom facemask that cleverly incorporated a “G” into the protective design. Stanton had been hit in the face by the Brewers’ Mike Fiers on September 11, 2014 resulting in fractures that ended his season. No longer newsworthy, facial protection is now commonplace with an ever-increasing number of MLB players opting for jaw guards incorporated into their batting helmets.
On April 4, 1998 Twins outfielder Otis Nixon coaxed a first-inning walk but was soon forced out at second. During the play at the bag, Royals shortstop Félix Martínez kicked Nixon in the face. Nixon stayed in the game but later learned that he had sustained a fractured jaw. When Nixon returned to the lineup on April 9, he utilized a batting helmet fitted with a full football facemask to protect his jaw and with hopes he would not need to undergo a surgical repair. This unfortunate injury, however, offered Nixon the opportunity to don the widest variety of protective headgear ever depicted on baseball cards by a single player.
Otis Nixon was not eligible to use a flapless helmet because he first appeared in the Major Leagues in 1983; however, here he is while with Cleveland:

Nixon also used a single-flap helmet with the Expos:

As a switch-hitter, Nixon subsequently joined the double-flap helmet trend:

And with his appearance for Minnesota following the broken jaw incident, here is Nixon donning the helmet with protective face gear:

Unlike facial bones, Nixon’s sartorial record appears unbreakable.
Sources:
Retrosheet.org
Baseball-Reference.com
Bill Nowlin, “Bob Montgomery,” SABR Bio Project
Paul Lukas, “Giancarlo Stanton’s Mask Not a First,” http://www.ESPN.com, March 4, 2015, accessed April 5, 2021.
“Interference Rule Amended,” Cincinnati Enquirer, December 2, 1970.
“Parker returns to lineup and Pirates win pair,” The Morning Call (Allentown, Pennsylvania), July 17, 1978.
“Quick Kick,” Kansas City Star, April 5, 1998.
Mike Klingaman, “Catching Up With … former Oriole Gary Roenicke,” Baltimore Sun, July 7, 2009.
Not incidentally, Otis’ headgear all with different teams! Great stuff.
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“He is probably the world’s foremost photographer of triple peanuts found at ballgames”–I don’t know how I continue to be surprised by the things people do…
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