Corbin Burnes is finally back with the Arizona Diamondbacks, but his return has created another important question beyond what he can provide during the final weeks of the season.

The immediate concern is performance.

Burnes made his official return against the Kansas City Royals on Tuesday and delivered three scoreless innings, helping Arizona win 5-3.

The outing was relatively effective as he surrendered just two hits with two strikeouts and two walks.

However, his fastball velocity was noticeably lower and he had to work through those three innings rather than dominate in the way Arizona became accustomed to before his injuries.

Once that initial evaluation period passes and Burnes contributes whatever he can during the Diamondbacks’ late-season postseason push, attention will inevitably shift toward his contract.

Burnes has an opt-out after this season, creating uncertainty about whether he will remain in Arizona or test the open market.

MLB Insider Jeff Passan from ESPN does not expect much suspense.

Passan predicted that Burnes will stay with the Diamondbacks rather than opt out of the franchise-record six-year, $210 million contract he signed.

He pointed to the four years and $140 million remaining on the deal and argued that even an exceptional finish would be unlikely to change the equation.

“Burnes returned from Tommy John surgery that had sidelined him for 15 months and threw three scoreless innings Tuesday. He could go the rest of the year without giving up a run and still not opt out of the four years and $140 million left on his deal,” Passan wrote.

“Will he opt out: No.”

Whether that becomes good news or a long-term financial concern depends heavily on how Burnes performs moving forward.

There are strong reasons to believe staying is the most realistic outcome.

Burnes worked 64.1 innings over only 11 starts for Arizona before missing more than half of 2025 and almost all of 2026 because of Tommy John surgery and a subsequent shoulder injury suffered during his rehabilitation.

Without an extreme late-season surge and a deep postseason run, it would be difficult for his market to develop enough to produce a contract worth more than the four years and $140 million he already has guaranteed.

There is also a personal factor.

When Burnes originally signed with Arizona, he cited the importance of living full time in the state where he and his family have established their home.

At his best, Burnes brings far more than velocity. He offers command, sequencing and the ability to manipulate several pitches depending on the hitter and situation.

Burnes has the experience to recognize quickly when one part of his arsenal is not working and adjust his plan without losing control of an outing.

That adaptability becomes particularly important after major surgery, when a pitcher may not immediately regain every physical advantage he previously possessed.

Burnes also brings the mentality of a proven frontline starter.

He is comfortable attacking hitters, pitching in pressure situations and carrying responsibility at the front of a rotation.

If he can return close to full form, his contract could benefit both sides.

If not, Arizona could be left carrying a significant financial commitment to a 31-year-old pitcher coming off two major physical setbacks.

It is still far too early to determine which version of Burnes the Diamondbacks will ultimately have.