On 8 September 1998, Mark McGwire of the St. Louis Cardinals hit his 62nd homerun and thus broke Roger Maris’s record of 61 in a baseball season.
Richert, Lucas Paul. "Mark McGwire breaks baseball homerun record". The Literary Encyclopedia. First published 01 November 2008
[http://www.litencyc.com/php/stopics.php?rec=true&UID=5751, accessed 19 May 2013.]