In the 2010 MLB Draft, the Mets chose with the 572nd overall selection in the 19th round, RHP Jonathan Kountis. Jonathan played for two seasons in the Mets organization.
Jonathan began his professional career in June 2010 with the Brooklyn Cyclones (A-) of the New York Penn League and split the season between Brooklyn and the Kingsport Mets (Rookie) of the Appalachian League. Jonathan appeared in 14 games (9 starts) and recorded a record of 1-2 with a 5.13 ERA. He pitched 40 1/3 innings, allowing 44 hits, walking 24, striking out 39, hitting 7 batters, and had a WHIP of 1.69.
In 2011, Jonathan appeared on the roster of the Kingsport Mets from June 22nd to July 1st and appeared in 5 games with a record of 0-0 and an ERA of 15.19. He pitched 5 1/3 innings, allowing 10 hits, walking 2, and striking out 5 with a WHIP of 2.25.
By 2012, Jonathan was playing in Indy ball with the Lake Erie Crushers of the Frontier League where he saw success as the team’s closer, appearing in 40 games and posting a record of 6-2 with an ERA of 1.06 and 18 saves. He pitched 59 2/3 innings, allowing 31 hits, walking 19 and striking out 63 with 11 hit batsmen and a WHIP of 0.84.
Jonathan’s 2012 performance in the Frontier League allowed him to find his way back to the affiliated minors in 2013, albeit briefly. He appeared with the Vancouver Canadiens (A-) of the Northwest League (Toronto affiliate) until July 12th, where he appeared in 10 games posting a record of 0-0 and an ERA of 5.79 and 3 saves, pitching 9 1/3 innings, allowing 16 hits, walking 5, hitting 2 batters, and striking out 10 with a WHIP of 2.25.
Jonathan found himself back in the Indy Leagues, this time with the Laredo Lemurs of the Association. His stint there was short, from July 19th – July 25th where he appeared in 4 games with a 0-0 record an an era of 12.27. He pitched only 3 2/3 innings with Laredo to the tune of a 3.00 WHIP.
By July 30th, 2013 – Jonathan was back in the Frontier League with the Frontier Greys (the league’s traveling team that does not have a home ballpark) where he spent the remainder of the season. For the Greys, he appeared in 9 games (7 starts) with a record of 1-5 with an ERA of 7.08.
All in all, the 2013 was a disappointing one for Jonathan. With three teams in three different leagues, he appeared in 23 games (7 starts) and had a combined record of 1-6 with an ERA of 7.23. He pitched 47 1/3 innings, allowed 60 hits, walked 34, struck out 49 batters, hit another 8, and had a WHIP of 1.99.
On October 16, 2013 – the Washington Wild Things of the Frontier League announced that they had signed Jonathan Kountis to be their closer for the 2014 season.