In football the basic job of a defensive player is to stop the advance of the opposing offence. In aquaculture, a defensive play would include the water treatment systems designed to provide the necessary environment for optimal growth - and key amongthem is solids removal. Charles Tillman has an interesting claim to fame: The Chicago Bears cornerback has forced 39 fumbles in his professional career and an impressive four in one game. Since such statistics have been kept, no other player has matchedthis performance. The basic job of a defensive player is to stop the advance of the opposing offence. Tillman's focus on forced fumbles (and interceptions) doesn't just stop the advancing offense, but does something far more effective - takes them rightoff the field and brings his own offense onto the field. The majority of teams have an "offensive point share" percentage greater than 90% meaning that more than 90% of the scoring is done by the offense and less than 10% of scoring is done by the defense. A forced fumble gets the Bear's offense back onto the field and is therefore 10 times more effective than a tackle.
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