STL All Sports

1910-Player withdrawn from game for any reason was permitted to return to play in subsequent period. Game divided into quarters of 15 minutes each, instead of old rule of 30-minute halves. Time out between first and second, andthird and fourth quarters fixed at 1 minute, with 30 minutes out for rest between halves.

1912-Teams allowed 4 downs to advance ball 10 yards instead of 3. Dimensions of field reduced to 100 yards with extra space of 10 yards behind each goal, the latter being zone in which forward pass might be legally caught by the offensive side. Kick-off, formerly delivered from middle of field, changed to the 40-yard line. Kick-off following a touchback removed from the 25-yard line to the 20-yard line. Value of touchdown increased from 5 to 6 points.

1913-Chicago players numbered in game against Wisconsin.

1915-Numbering of players started at University of Pittsburgh.

1917-Substitutes prohibited from talking with members of team upon the field until after completion of their first play.