Marco Luciano's rise up the rankings of the top prospects in baseball continued Wednesday morning.

Luciano turned 18 years old Sept. 10. Just four months later, Baseball America has named the young Giants shortstop as the No. 19 overall prospect in the game.

The Giants have three prospects on Baseball America's new top 100 before the 2020 season. Behind Luciano are catcher Joey Bart (32) and center fielder Heliot Ramos (63).

Hunter Bishop, the Giants' top pick from the 2019 MLB Draft, has fallen off Baseball's top 100. Bishop was ranked No. 98 in July.

Luciano is ranked as Baseball America's fourth-best shortstop prospect, but that comes with a catch. Gavin Lux and Carter Kieboom both are ranked ahead of him, however, their primary positions aren't shortstop anymore. Lux likely will be the Los Angeles Dodgers' Opening Day second baseman, while Kieboom could be the Washington Nationals' starting third baseman after Anthony Rendon signed with the Angels.

Playing at only 17 years old all season long, Luciano burst onto the scene in 2019. He hit .322 with 10 homers and a 1.055 OPS in 38 games in the Arizona Rookie League before being promoted to the Salem-Keizer Volcanoes in Class A Short Season.

When Baseball America last updated their top 100, Luciano was ranked No. 63. He has jumped 44 spots with his off-the-charts potential. On the 20-80 scouting scale, Baseball America ranks Luciano's hit tool as a 60 and his power as a 70.

SS Marco Luciano (17.10Y) hit his 9th HR of the season for AZL Giants Orange. He's now in a three-way tie for first place in the league in home runs.

Season: 137 PA .348/.453.687, 20K%, 13BB%, 7SB, 189wRC+.

Video of the HR: pic.twitter.com/Qdta5TSmvd — GPT (@giantsprospects) July 28, 2019

Giants fans saw much more of Bart, 23, and Ramos, 20, last season than Luciano. The duo played together in San Jose and were promoted to Double-A Richmond on the same day.

[RELATED: Baseball America releases new top 10 Giants prospects]

Though he battled a hand injury in San Jose -- and again in the Arizona Fall League -- Bart hit .278 with 16 homers and an .824 OPS between the two levels. Ramos was even more impressive, hitting .290 with 16 long balls and an .850 OPS.

Bart and Ramos are expected to start the season in Triple-A Sacramento. There's no doubt Bart is in line to take over as the Giants' top catcher in the near future, while Ramos is the Giants' most exciting young outfielder in years.