It was Kosco's third season as a pro, first in the California League.
"I feel that I'm improving everyday and learning more and more as the year goes by," Kosco told The Sun that July. "I think the reason for it is that I'm maturing as a ballplayer and hopefully that will land me a spot in the majors someday."
Kosco made AA Williamsport the next year. He even got three games at AAA Calgary. Kosco, though, never made the majors.
Kosco's career began in 1986, taken by the Mariners in the 13th round of the draft out of Ball State University and Florida State. He also came from a baseball family. His father Andy Kosco played in the majors; his brother Bryn Kosco played in the minors.
At Florida State in 1985, Kosco hit a two-run home run in a March game to help his team to a ninth-inning comeback.
With the Mariners, Kosco started at single-A Salinas. He hit .236 in 59 games. For 1987, he moved to single-A Wausau. He hit 10 home runs, but his average was just .206.
He split 1988 between Wausau and single-A San Bernardino. He hit .256 between them, with 20 home runs.
It was in 1989 that Kosco played between three different levels. At San Bernardino, he got into 50 games and hit 12 home runs. He hit two of those home runs in one game, the day after getting hit by a pitch, according to The Sun.
"I'm just trying to shake the headache now," Kosco told The Sun. "I was seeing the ball well and really didn't have any problems."
Kosco also got 56 games with AA Williamsport. He hit just .188. He spent three games up at AAA Calgary, getting four hits in 12 at bats.
He returned to Williamsport for 1990. In 96 games, he hit just .195. It was his final season as a pro.
- San Bernardino County Sun, July 5, 1988: Baseball a family affair for Kosco
- San Bernardino County Sun, June 12, 1989: San Bernardo Spirit overcame three errors
Made the Majors: 859 - 46.5%
Never Made Majors: 988-53.5%-X
5+ Seasons in the Majors: 368
10+ Seasons in the Minors:217