Diamondbacks stay in the wild-card hunt at 49-47, carried by Carroll and Marte

The Arizona Diamondbacks reach the All-Star break at 49-47, above .500 and in the thick of the NL wild-card race, kept there by two of the better all-around players in the sport. It's a familiar spot for a team that reached the World Series not long ago — talented enough to contend, flawed enough that October is far from guaranteed.

The stars are holding up their end

Corbin Carroll and Ketel Marte have been everything Arizona could ask for, leading the charge as the kind of two-way, do-everything players a contender is built around. When your best players are performing like genuine stars, you're never out of a game, and the D-backs' spot in the wild-card race is a testament to the top of their roster carrying the load.

The offense, generally, has kept Arizona competitive. This is a team that can score, that plays an aggressive brand of baseball, and that has the position-player talent to hang with anyone in the National League. On the strength of the lineup alone, the D-backs belong in the playoff conversation.

The rotation problem

The issue — and it's a significant one — has been the starting pitching. Arizona's rotation has been a real weakness in the first half, and for a team with October ambitions, that's the thing that has to get fixed. You can ride a great lineup a long way, but you can't ride it past a rotation that puts you in a hole every few nights. If the D-backs are going to make a serious second-half push, they need more from the top of their staff.

That makes the deadline pivotal. Arizona should be hunting for starting pitching before July 31 — the single upgrade most likely to turn a fringe contender into a real one. Whether the front office can find the right arm at the right price may well determine the season.

Second-half outlook

The wild card is within reach, and with Carroll and Marte anchoring the roster, the D-backs have the star power to make a run. But the rotation is the ceiling on this team, and until it improves, Arizona projects as a team that can stay in the race without necessarily winning it. Add a starter at the deadline and the calculus changes in a hurry. The first half proved the lineup can carry them a long way. The second half is about whether the pitching can carry them the rest.