Jackson Flora's professional career is officially underway, and the San Francisco Giants received plenty to like from their newest pitching prospect.

The Giants’ first-round selection in the 2026 MLB Draft made his professional debut Friday night for Single-A San Jose, taking the mound against the Fresno Grizzlies at Chukchansi Park.

Flora needed only one inning to make an impression. The right-hander worked around a double and a walk while striking out two batters in a scoreless frame, helping San Jose secure an 8-5 victory.

The outing consisted of 28 pitches, with 14 finding the strike zone. His fastball reached 98 mph, while his slider provided another weapon as he worked through the Fresno lineup.

Flora opened the inning by attacking the top of Fresno's order and recorded his first professional strikeout on a called third strike. He later added another strikeout with his slider, using the pitch to finish off a batter after falling behind in the count.

The only real trouble came when a ground ball got through the infield for a double, followed by a walk. Flora responded by limiting the damage and ending the inning without allowing a run.

For a pitcher making his first appearance in affiliated baseball, the combination of velocity, breaking stuff and the ability to work through adversity provided an encouraging introduction.

Flora's professional debut was brief by design, but it offered the Giants an early glimpse at why they selected him fourth overall.

The 21-year-old enters professional baseball following a dominant season at UC Santa Barbara.

Flora established himself as one of the premier pitchers in the country during his final collegiate campaign. He finished the season with a 1.06 ERA and held opposing hitters to a .155 batting average while recording 133 strikeouts over 102 innings.

His 12 victories also led the nation, while his strikeout total established a new single-season record for UC Santa Barbara.

Those numbers helped Flora become a Golden Spikes Award semifinalist and earn consensus first-team All-American recognition. He was also widely regarded as the top pitching prospect available in the 2026 Draft.

The Giants ultimately made him the fourth overall selection, adding a highly polished arm to an organization that has continued to invest heavily in its pitching development.

Flora will have an opportunity to continue pitching this year despite joining San Jose late in the season.

The Giants' affiliate qualified for the California League playoffs after winning the division during the first half of the season. San Jose is also positioned well in the second half, giving Flora a chance to potentially gain additional professional experience before the offseason.

That could be valuable as he prepares for his first full professional season in 2027.

Flora already possesses several characteristics that could allow him to move quickly through the Giants' system. His fastball velocity gives him a foundation to attack hitters, while his breaking pitches and changeup give him multiple ways to keep hitters off balance.

His ability to consistently throw strikes was also a major factor in his draft evaluation.

The Giants don't need to rush their newest pitching prospect, but Flora's combination of collegiate production and a well-rounded arsenal gives him an opportunity to become one of the organization's more prominent young arms.

For now, the first step has been completed. Flora has officially gone from one of the most highly regarded amateur pitchers in the country to a professional, and his first scoreless inning suggests the Giants may have something special developing.