Fletcher Manson "Sled" Allen (August 23, 1886 – October 16, 1959) was a professional baseball catcher and manager.
 Allen was also a sports promoter after retiring from baseball.
 Allen played a total of nine seasons in professional baseball, including a part of one in Major League Baseball with the St. Louis Browns (1910).
 Over his major league career, Allen batted .130 with three hits in 14 games played.
 Allen also played in the minor leagues with the Class-C Enid Railroaders (1908–1909), the Class-A Louisville Colonels (1910) and the Class-B Houston Buffaloes (1912–1916).
 During his minor league career, Allen compiled a .210 batting average with 465 hits, 63 doubles, 15 triples and five home runs in 748 games.
 Allen was a manager in the minor leagues for the Class-B Houston Buffaloes (1911), the Class-D Ranger Nitros (1921), the Class-D Lubbock Hubbers (1923) and the Class-A Amarillo Texans (1928).
 Allen is the father of country music singer Terry Allen.
Michael Patrick Redmond (born May 5, 1971) is an American former professional baseball catcher and manager.
 He is currently the bench coach for the Colorado Rockies.
 He played for 13 seasons in Major League Baseball with the Florida Marlins, Minnesota Twins, and Cleveland Indians.
 In 864 career games, Redmond recorded a batting average of .287 and accumulated 13 home runs, and 243 runs batted in (RBI).
Robin Mark Ventura ( ; born July 14, 1967) is an American former professional baseball third baseman and manager.
 Ventura played 16 seasons in Major League Baseball (MLB) for the Chicago White Sox, New York Mets, New York Yankees and Los Angeles Dodgers.
 He was also the manager for the White Sox for five seasons.
 The White Sox selected Ventura with the tenth overall pick in the 1988 amateur draft from Oklahoma State University (OSU).
 He is a six-time Rawlings Gold Glove winner, two-time MLB All-Star selection and a National College Baseball Hall of Fame inductee.
Jorge Rafael Posada Villeta (born August 17, 1971) is a Puerto Rican former professional baseball catcher who played 17 seasons in Major League Baseball (MLB) for the New York Yankees.
 Posada produced strong offensive numbers for his position, recording a .273 batting average, 275 home runs, and 1,065 runs batted in (RBIs) during his career.
 A switch hitter, Posada was a five-time All-Star, won five Silver Slugger Awards, and was on the roster for four World Series championship teams.
Michael Joseph Piazza ( ; born September 4, 1968) is an American former professional baseball catcher who played 16 seasons in Major League Baseball (MLB), from 1992 to 2007.
 He played most notably for the New York Mets and Los Angeles Dodgers, while also having brief stints with the Florida Marlins, San Diego Padres, and Oakland Athletics.
 A 12-time All-Star and 10-time Silver Slugger Award winner at catcher, Piazza produced strong offensive numbers at his position; in his career, he recorded 427 home runs—a record 396 of which were hit as catcher—along with a .308 batting average and 1,335 runs batted in (RBIs).
Dwight Eugene "Doc" Gooden (born November 16, 1964), nicknamed "Dr. K", is an American former professional baseball pitcher who played 16 seasons in Major League Baseball (MLB).
 Gooden pitched from 1984 to 1994 and from 1996 to 2000 for the New York Mets, New York Yankees, Cleveland Indians, Houston Astros, and Tampa Bay Devil Rays.
 In a career spanning 430 games, he pitched 2,800 ⁄ innings and posted a win–loss record of 194–112, with a 3.51 earned run average (ERA), and 2,293 strikeouts.
Joseph Michael Nathan (born November 22, 1974) is an American former professional baseball pitcher.
 He played 16 seasons in Major League Baseball for the San Francisco Giants, Minnesota Twins, Texas Rangers, Detroit Tigers, and Chicago Cubs.
 Nathan started out his baseball career as a shortstop in high school and while at Stony Brook University, but converted to a pitcher after being drafted by the San Francisco Giants.
 He worked his way through the minor leagues, alternating between spots in the rotation and the bullpen.
 After a few years of splitting time between the majors and the minors, Nathan had a breakout season as a setup man for the Giants in 2003.
 That offseason, Nathan was traded to the Minnesota Twins and became their closer.
Lawrence Peter "Yogi" Berra (May 12, 1925 – September 22, 2015) was an American professional baseball catcher, who later took on the roles of manager, and coach.
 He played 19 seasons in Major League Baseball (MLB) (1946–63, 1965), all but the last for the New York Yankees.
 He was an 18-time All-Star, and won 10 World Series championships as a player—more than any other player in MLB history.
 Berra had a career batting average of .285, while hitting 358 home runs and 1,430 runs batted in.
 He is one of only five players to win the American League Most Valuable Player Award three times.
 He is widely regarded as one of the greatest catchers in baseball history, and was elected to the Baseball Hall of Fame in 1972.
Mark Charles Teixeira ( ; born April 11, 1980) is an American former professional baseball first baseman.
 He played 14 seasons in Major League Baseball (MLB) for the Texas Rangers, Atlanta Braves, Los Angeles Angels of Anaheim and New York Yankees.
 Before his professional career, he played college baseball at Georgia Tech, where in 2001 he won the Dick Howser Trophy as the national collegiate baseball player of the year.
 One of the most prolific switch hitters in MLB history, Teixeira was an integral part of the Yankees' 27th World Series championship in 2009, leading the American League (AL) in home runs and runs batted in (RBI) while finishing second in the Most Valuable Player Award (MVP) balloting.
 Teixeira was a three-time All-Star, won five Gold Glove Awards and three Silver Slugger Awards, and also holds the all-time major league record for most games with a home run from both sides of the plate, with 14.
 He was the fifth switch hitter in MLB history to reach 400 home runs.
New York Steel was a benefit concert emceed by Eddie Trunk and Mike Piazza, featuring heavy metal musicians, that took place on November 28, 2001 at Hammerstein Ballroom in New York City in response to the September 11, 2001 attacks.

Question: The benefit concert "New York Steel" held by this American former professional baseball catcher who played 16 seasons who had how many home runs?
Answer: 427