It doesn't take Wednesday's contract extension to see why John Lynch partners so well with 49ers coach Kyle Shanahan.
It merely affirms that.
They've built the 49ers from NFL doormat to Super Bowl contender. Last season was not a one-off.
The 49ers ownership is relieved it finally found a tight-knit, productive tandem. Three years ago, this union "came out of the blue," as Lynch referred to it Tuesday when he hinted that he'd indeed strike a contract extension, one that runs through 2024, a league source confirmed.
Shanahan landed his own extension last month, curiously for a year longer than Lynch's. They've stopped a whiplash hiring cycle.
"I don't know if I'm going to be a lifer at this thing, but I love what we're doing, I love coming to work each and every day and I think there's good news on the horizon there," Lynch said Tuesday on KNBR 680-AM. "Jed (York, the 49ers' CEO) and his family have been tremendous to me.
"I'm loving what we're doing and building."
What he'd love next is finishing off an extension with tight end George Kittle. That is where Lynch and his unheralded support staff must do some heaving lifting to keep up the good vibes as they begin Camp COVID-19.
So why do Lynch and Shanahan work so well in harmony -- obliterating a contrarian report that surfaced last year?
Let's start behind closed doors. What's happened in there has stayed in there. If there is any criticism or grudges exist, it hasn't leaked out, nor been evident visibly.