The most easily attainable record in all of sports

The San Diego Chargers running back LaDainian Tomlinson rushed for three touchdowns Sunday to bring his season total to 29, a new single-season record. He eclipses the record set last year by Shaun Alexander of the Seattle Seahawks, who eclipsed the record set just two seasons before that by Priest Holmes of the Chiefs, who eclipsed the Rams' Marshall Faulk's record set three seasons before that.

If the speed at which this record gets broken continues to increase at this rate, someone will break Tomlinson's record before he's done setting it.

Almost to prove how easy it is to score touchdowns, Tomlinson rushed for another TD -- while I was writing this yesterday. I'm not making that up. I had to go back up to the top and change it to say he broke the record instead of just tied it.

Is there another record in sports that is broken almost every year? Does this record even mean anything any more? Can somebody who knows more about football than me explain why it keeps getting broken?