If it looks like a competition and sounds like a competition, maybe, just maybe, it is one — even if it runs counter to everything we have assumed since April.

Case in point: the Dolphins’ tight end position through the first two days of training camp.

Dustin Keller, as expected, has worked with the first-team offense.

But so have Charles Clay and Michael Egnew. And none has been as surprising as rookie Dion Sims.

“Absolutely it’s an open competition,” coach Joe Philbin said Monday. “We’re looking a lot of different combinations at this point in time, and it’s wide open.”

Regarding Sims, who caught a handful of passes Monday, Philbin added: “Looked like he had a very good day.”

Of course, the usual disclaimers apply. Training camp has just begun, and the Dolphins can’t even put on pads until Tuesday. Plus, coaches often use such remarks to motivate more than illuminate.

Anyone but Keller starting Week 1 would be a shock. His base salary of $3.3 million for 2013 is twice what the other three players are due to make combined.

And he’s clearly the most accomplished of the group, with 241 career catches and 17 touchdowns.