Everyone watching the Boston Celtics in the playoffs kept thinking the same thing: Add Kyrie Irving and Gordon Hayward back into this lineup next summer and — bang — instant contender.

That leads to the question: Just where are Irving and Hayward on their recovery tracks? Glad you asked.

That’s a good sign for the Celtics. And for fans of good basketball.

One word of caution: Progression when adding stars into a system is not necessarily linear.