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SF Giants pitching prospect earns California Pitcher of the Week honors after dominant outing

Another strong outing
ByJeff Young|
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Apr 15, 2026; Cincinnati, Ohio, USA; The Jackie Robinson patch is seen on a San Francisco Giants game hat, resting on the dugout steps, during the game against the Cincinnati Reds in the first inning at Great American Ball Park. Players and coaches will wear No. 42 in honor of Jackie Robinson Day around the league. Mandatory Credit: Aaron Doster-Imagn Images
Apr 15, 2026; Cincinnati, Ohio, USA; The Jackie Robinson patch is seen on a San Francisco Giants game hat, resting on the dugout steps, during the game against the Cincinnati Reds in the first inning at Great American Ball Park. Players and coaches will wear No. 42 in honor of Jackie Robinson Day around the league. Mandatory Credit: Aaron Doster-Imagn Images | IMAGN IMAGES via Reuters Connect

Argenis Cayama was nearly perfect in last week’s outing against the Lake Elsinore Storm. That did not go unnoticed, as the SF Giants pitching prospect earned California League Pitcher of the Week honors.

That was not the only dominant outing by a San Jose Giants starter last week. On Sunday, Keyner Martinez completed five scoreless innings with eight strikeouts and zero walks.

It has been a mixed bag for Martinez, who has one of the best fastballs in the organization. He has had no problem getting California League hitters to swing and miss, but the control is a work in progress.

Martinez’s outing helped notch the series sweep against Lake Elsinore. The Storm secured a playoff spot after clinching a first-half title. Of course, the other team to do that was San Jose. It has been a steep drop-off for Lake Elsinore, which is not uncommon for minor league affiliates. Those rosters at the beginning of the year tend to look much different from the one at the end of the season due to injuries, trades, and promotions.

SF Giants pitching prospect looking to finish the season on a high note after dominant outing

Argenis Cayama has had plenty of highs and some lows in 2026. Overall, he is pitching to a 4.18 ERA, 3.96 FIP, 1.18 WHIP, 11.5 K/9, and a 5.08 SO/W rate across 51.2 frames for San Jose. This includes a healthy 49.6 percent ground ball rate.

The 19-year-old pitcher had a pop-up season in the Arizona Complex League last summer. He has carried that into 2026, but he missed time due to injury.

Cayama has a starter’s pitch mix and fills up the strike zone better than most pitchers his age. He throws from a three-quarters arm slot and flashes a mid 90’s four-seamer and sinker. The four-seamer misses some bats, and the sinker induces plenty of ground ball contact.

The young pitcher also mixes in a low 80’s slider and a mid 80’s changeup. The slider has improved from a slurvy breaking ball to one with tighter, two-plane movement. Plus, the slider gives hitters an offering with more glove side movement than the rest of his arsenal. The changeup gets fading movement, and has just enough velocity separation to play off of his fastballs.

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