Philadelphia Phillies all-time roster (I–J)

The Philadelphia Phillies are a Major League Baseball team based in Philadelphia, Pennsylvania. They are a member of the Eastern Division of Major League Baseball's National League. The team has played officially under two names since beginning play in 1883: the current moniker, as well as the "Quakers", which was used in conjunction with "Phillies" during the team's early history. The team was also known unofficially as the "Blue Jays" during the World War II era. Since the franchise's inception, players have made an appearance in a competitive game for the team, whether as an offensive player (batting and baserunning) or a defensive player (fielding, pitching, or both).

Of those Phillies, 10 have had surnames beginning with the letter I, and 57 beginning with the letter J. Two members of this list have been inducted into the Baseball Hall of Fame: pitcher Ferguson Jenkins, who played two seasons with Philadelphia before joining the Chicago Cubs; and first baseman Hughie Jennings, whose tenure with the Phillies encompassed the 1901 and 1902 seasons. One list member was also elected to the Philadelphia Baseball Wall of Fame; Willie "Puddin' Head" Jones was the starting third baseman for the Whiz Kids during his 13 seasons with the team.

Among the 34 batters in this list, Orlando Isales has the highest batting average, at .400; he collected two hits in five at-bats during the Phillies' 1980 championship season. Other players with an average over .300 include Tadahito Iguchi (.303 in one season); and Jay Johnstone (.303 in five seasons), who has the highest mark among the players whose surnames begin with J. Jones leads all players on this list with 180 home runs and 753 runs batted in (RBI). Raúl Ibañez leads the I-named players with 70 home runs and 260 RBI.

Of this list's 33 pitchers, two share the best win–loss record, in terms of winning percentage: Alex Jones won one game and lost none; and Eric Junge collected a 2–0 record in two seasons with Philadelphia. Larry Jackson leads all pitchers in this list with 41 victories, while Syl Johnson's 51 defeats are the highest total in that category. Jackson's 373 strikeouts are the best total of any pitcher in this list. Among the pitchers whose names begin with I, Ham Iburg leads in wins (11), losses (18), winning percentage (.379), and strikeouts (106).