PLAYCALLER
Riley O'Brien
SP

Riley O'Brien

STL active

Riley O'Brien is a SP for the STL (MLB). Currently active. Riley is a starting pitcher tracked by PlayCaller for fantasy baseball streaming and roster decisions.

Frequently Asked Questions

Is Riley O'Brien playing this week?
As of November 4, 2026, no injury designation has been reported for Riley O'Brien. He is expected to be available this week.
Should I start Riley O'Brien in fantasy baseball this week?
MLB is in the offseason, so there's no start/sit decision to make for Riley O'Brien right now. Check back once the regular season begins.
What is Riley O'Brien's injury status?
As of November 4, 2026, no injury designation has been reported for Riley O'Brien. He is listed as active.
How has Riley O'Brien been performing recently?
Riley O'Brien has no recent game activity: MLB is currently in the offseason. Recent stat lines return once the season starts.
Recent Performance

Offseason Outlook

  • MLB is currently in the offseason. Check back when the season resumes for performance data and start/sit recommendations.

Riley O'Brien takes the ball for St. Louis as a starting pitcher with a chance to develop into a reliable rotation piece for the Cardinals. Without recent performance data available, it's worth monitoring how he manages his workload and command as the season progresses. O'Brien's value will likely depend on his ability to stay healthy and keep opposing offenses off balance over multiple outings.

Compare & Matchups
Riley O'Brien vs Kyle Leahy →Riley O'Brien vs Michael McGreevy →Riley O'Brien vs Andre Pallante →
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