John O’Brien

Cinders O’Brien

Jack O’Brien

The first professional baseball team Jack O’Brien played for…

John O’Brien

When John Joseph O’Brien took the field for the Brooklyn Bridegrooms…
Courtesy of John Thorn

Jack O’Brien

A hard-luck catcher with a strong bat, Jack O’Brien was a…
Johnny O'Brien (THE TOPPS COMPANY)

Johnny O’Brien

“The bonus rule will ruin baseball if it isn’t curtailed,”…

Joe O’Brien

Pete O’Brien

Pete O’Brien

Pete O’Brien

Pete O’Brien

Ray O’Brien

Bob O'Brien (Trading Card DB)

Bob O’Brien

In the early 1970s, lefty pitcher Bob O’Brien made an unlikely…

Syd O’Brien

Infielder Syd O’Brien was one of three brothers, all of whom…

Tommy O’Brien

Outfielder Tommy O'Brien filled in admirably as a backup for…

Tom O’Brien

Tom O'Brien (BASEBALL-REFERENCE.COM)

Tom O’Brien

On October 27, 1900, the steamship Havana carried 20 American…

Buck O’Brien

Asked by a sportswriter in January 1912 which pitcher was giving…

William O’Brien

Darby O’Brien

Billy O’Brien

Riley O’Brien

Willie O’Bryant

Danny O’Connell

Instead of being the good-hitting second baseman and field leader…