Assertion: fullback | /r/HasProperty | lead blocker
Facets:
value: usually
type: DEGREE
Source sentences:
text: Now that most offensive formations have only one or two running backs, the original designations do not mean as much, as the fullback is now usually a lead blocker (technically a halfback), while the halfback or tailback (called such because he stands at the "tail" of the I) lines up behind the fullback.