So much for that calf injury. So much for that contract negotiation.

Jauan Jennings was back at work on Monday, seven weeks to the day his contract dispute became public and 36 days after a calf injury took him off the practice field.

And while I’m sure both the 49ers and the wide receiver will play this unnecessary and unbecoming summer saga off like it was no big deal, the truth is that nothing was accomplished, and plenty was lost over these last few weeks.

Jennings’ ability to help the Niners in the team’s Week 1 division game with the Seahawks — three practices away as of Monday morning — should be viewed with deep skepticism. There’s simply no reason to believe he’ll be anywhere near full speed for that contest — and it’s not as if Jennings is the kind of player who has a step to

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