According to the NFL press release announcing the suspension, this is Harrison’s fifth illegal hit against a quarterback in the past three seasons.
In addition to four fines for illegal hits against quarterbacks in 2009 and 2010, Harrison also was fined twice for unnecessary roughness during that period. Harrison totaled six fines in that two-year period.
According to the NFL’s 2011 League Policies for Players manual: “Players who were fined for violations in 2009 or 2010, and whose fines were either partially or fully upheld, will be considered second and/or repeat offenders under this policy.”
If that doesn’t describe Harrison, we don’t know what does.