The Orioles are the team that won’t go away. For months now, they’ve been predicted to, expected to, and they have no end of excuses for why they’re supposed to be long since out of the expanded wild-card picture already. Injuries, run differential, relative anonymity plus generally underwhelming performances from most of the people you have heard of -- the Orioles are supposed to be goners.

They aren’t gone, but they might be going places. On Saturday, it was Zach Britton’s bend-don’t-break stylings that were their latest “that’s not really possible, is it?” feat. Seven shutout innings against the Tigers make for some sort of Saturday night special, not bad for the latest transient solution in Buck Showalter’s constantly fixed-up rotation.

Go by appearances alone, and it seemed like Britton had no business matching zeroes with the Tigers’ Rick Porcello, allowing nine baserunners to Porcello’s four through the first six innings. But three 6-4-3 double plays were enough to keep his head above water. Porcello had retired 11 men in a row heading into the seventh, but so what? A pair of dink singles and Chris Davis’ three-run shot later, it didn’t matter what Porcello had done beforehand or how good he looked doing it, because the O’s had a decisive lead thanks to Davis’ just-enough bit of bopping, making Britton a winner.

That in itself might be a bit of a surprise, considering that Britton’s shot at pitching this year was no sure thing in March, when shoulder surgery seemed likely. But opting for platelet-rich plasma (or PRP) treatments put him on the shorter road to rehab, and he’s been the skippable, sometime-fifth starter for a team that barely goes a week without having to change something in its rotation.

The Orioles have managed to keep the identity of their rotation’s third or fourth or fifth starter a matter of a near-weekly surprise to everyone, including themselves. Some of that has been a matter of effective roster management by general manager Dan Duquette: Early in the season, the Orioles could afford to flip the optionable Tommy Hunter back and forth between Baltimore and Triple-A Norfolk, rostering him only when they had to. Despite that time spent shuttling back and forth, it says something about Baltimore’s lot that Hunter is now second on the team in total starts because almost everyone queued up ahead of him has broken down or pitched his way out of a job.

This yo-yo role Britton found himself in on Saturday, as he was called back up into the latest breach in the rotation after already blowing his initial call-up after the All-Star break, getting clobbered in five of six starts. In the Orioles’ ad-hoc rotation, he was back up because he was on the 40-man roster and had four days’ rest, and little else -- he was four days removed from getting chewed up by Charlotte, pitching through a split nail on his pitching hand.

Britton briefly dealt with the burden of being blown up too soon as a sign of better times to come in the spring of 2011, after he notched a quick eight quality starts in his first 10 turns as a rookie in the big-league rotation. But just like Brian Matusz and Jake Arrieta, his success didn’t last -- Britton managed just five starts of six innings or more and three runs allowed or less in his last 18 turns in 2011, putting him well on his way toward a new entry on the Orioles’ list of mound disappointments. But like every other expectation for an Orioles setback, it seemed to merely set the stage for this latest improbable bit of heroics.

Where the rotation woes of the Yankees or the Red Sox get featured prominently, the Orioles have been scrambling all season. Only Chinese import Wei-Yin Chen has lasted the season. Chen plus Britton, Hunter, former Mariners prospect Chris Tillman and journeyman Miguel Gonzalez represent the latest front-five confection in a rotation that has already had to use 10 starters. Every day, the four non-Chens are all pitching for their jobs, because Jason Hammel is on the mend and due back in another two weeks.

Contenders aren’t supposed to start TBD in three or four rotation slots this late in the season, are they? But this comes on top of their playing TBNL in left field. Davis was briefly their answer there, but so was Nolan Reimold, Endy Chavez, Xavier Avery and Steve Pearce. They’re down to a Nate McLouth-Lew Ford platoon that would be entirely plausible if we were talking about a contender -- in the International League.

All of which is part of what makes the Orioles so entertaining. As they scrape to keep pace with the Rays in the wild-card chase, it might be hard to call them the underdog, but that’s only if you keep your eyes peeled on payrolls. It’s easy to root for the Rays -- every statistically savvy smart kid goes fanboy on sabermetrics’ poster team. And they’re supposed to beat Baltimore -- they’re supposedly smarter, and stocked up on the really good players you already know, like Evan Longoria and David Price. And yet the Orioles still will not go away. Fun, ain’t it?

PHOTO OF THE DAY

Ryan Roberts might do a little dance, but it's Mike Trout who has a steal to celebrate. Kelvin Kuo/US Presswire

Christina Kahrl covers baseball for ESPN.com. You can follow her on Twitter.