NFL players' March musings on Twitter aren't necessarily the gold standard for information, but Randy Moss' comments Saturday line up with expectations the San Francisco 49ers will go with younger players at the position in 2013.

"Wished we could've finished the job!!thanks for the opportunity an good luck in the future 9ers," Moss' Twitter account said.

Moss is 36 years old. He provided value to the 49ers during a transitional season at wide receiver. The team needed him more than anticipated once an injury felled Mario Manningham. Whatever mentoring and veteran leadership Moss provided in 2012 carried value. The 49ers seemed to appreciate it genuinely.

Moss finished the regular season with 28 receptions for 434 yards and three touchdowns. His 15.5-yard average per reception was near the 15.6-yard average for his career. He was a positive factor. He also was willing to block.

But in the longer term, there's something wrong if the 49ers cannot develop younger alternatives at the position, particularly after using the 31st pick of the 2012 draft for receiver A.J. Jenkins. Moss is not the future.

If Moss were to re-sign with San Francisco, the 49ers ideally wouldn't be counting on him. They would be looking at him as a potential insurance policy. But if Moss' tweet is any indication, that policy is about to expire.