Question: What profession do Hughie Jennings and Joe Kelley have in common?

Closing In on the Fire is an album by Waylon Jennings, released on the small Ark 21 Records label on June 16, 1998.  It features contributions from several celebrities associated with both country and rock music.  The selections include, among others, Sting's "She's Too Good for Me" and Tony Joe White's title track, creating a greater degree of musical eclecticism than in many previous Jennings releases.  The singer incorporated elements of genres such as blues and rock, in addition to traditional country ballads.  "Best Friends of Mine", an autobiographical song, is a tribute to Buddy Holly, Hank Williams, Jr. and one of Jennings' close friends from his days in Phoenix.  Carl Smith, one of the performer's idols, appears on "Untitled Waltz".  In an interview, the singer mentioned that he wasn't fully satisfied with his take on The Rolling Stones' "No Expectations", calling it ""a little more contrived than I would have liked"".  An interview featuring Jennings commenting on the record is included as a bonus track.  "Closing In on the Fire", Jennings' 72nd release, reached #71 on the country charts and was the last studio album by the singer to be released before his death in 2002. <SEP> Hugh Ambrose Jennings (April 2, 1869 – February 1, 1928) was an American professional baseball player, coach and manager from 1891 to 1925.  Jennings was a leader, both as a batter and as a shortstop, with the Baltimore Orioles teams that won National League championships in 1894 , 1895 , and 1896 .  During those three seasons, Jennings had 355 runs batted in and hit .335, .386, and .401.  Jennings was a fiery, hard-nosed player who was not afraid to be hit by a pitch to get on base.  In 1896, he was hit by pitches 51 times – a major league record that has never been broken.  Jennings also holds the career record for being hit by pitches with 287, with Craig Biggio (who retired in 2007) holding the modern-day career record of 285.  Jennings also played on the Brooklyn Superbas teams that won National League pennants in 1899 and 1900.  From 1907 to 1920, Jennings was the manager of the Detroit Tigers, where he was known for his colorful antics, hoots, whistles, and his famous shouts of "Ee-Yah" from the third base coaching box.  Jennings suffered a nervous breakdown in 1925 that forced him to leave Major League Baseball.  He died in 1928 and was posthumously inducted into the Baseball Hall of Fame in 1945. <SEP> Mortimer Martin "Mert" Hackett (November 11, 1859 – February 22, 1938), was an American Major League Baseball player from Cambridge, Massachusetts, who played mainly as a catcher from 1883 to 1887 for three different team; the Boston Beaneaters, Kansas City Cowboys, and Indianapolis Hoosiers.  His brother, Walter Hackett, and cousins John Clarkson, Walter Clarkson, and Dad Clarkson as well as Tim Keefe and Joe Kelley (all born in Cambridge, Massachusetts) also played in the majors. <SEP> Joseph James Kelley (December 9, 1871 – August 14, 1943) was an American left fielder in Major League Baseball (MLB) who starred in the outfield of the Baltimore Orioles teams of the 1890s.  Making up the nucleus of the Orioles along with John McGraw, Willie Keeler, and Hughie Jennings, Kelley received the nickname "Kingpin of the Orioles".