2027 South Side Sox Top Prospect No. 91: Jonathan Clark

Jonathan Clark

Right-Handed Relief Pitcher

6´1´´

190 pounds

Age: 26

2026 South Side Sox Top 100 ranking 52

2026 High Level Birmingham (AA)

Age relative to high level +1.4 years

SSS rank among all right-handed relievers in the system 16

Overall 2026 stats (High-A/AA/AZFL) 9-3 ⚾️ 57 games (34 finishes) ⚾️ 9 SV ⚾️ 3.99 ERA ⚾️ 1.404 WHIP ⚾️ 70 K ⚾️ 33 BB ⚾️ 1.0 WAR

Jonathan Clark is one of the odder success stories in the White Sox system.

The San Jose State product was signed as an undrafted free agent not in July after the draft … but more than two years after Clark’s draft class matriculated. So when the White Sox inked Clark on Feb. 12, 2025, there was little in his history as a five-year starter for…