During Superbowl XLI, Rex Grossman performed poorly, throwing two interceptions and barely moving Chicago’s offence. According to the media, Grossman was one of the worst Superbowl quarterbacks ever – and possibly one of the worst to play that position in the history of the league. How bad was he?Breaking down the reasons for Grossman’s inauspicious performance generates a generic list: physical skill, knowledge of the game, composure under pressure, etc.. Like other major sporting events, performance under pressure on demand trumps all. During his career at Florida, Grossman demonstrated excellent physical tools at an elite collegiate program. He must still …