CLEVELAND — Trevor Rogers walked into the visitors clubhouse at Progressive Field just four hours before his first start with the Orioles and looked around.

This was his new team, one that has had so much turnover in the past few days that the roster on the wall has names scratched out in pencil and new ones scribbled at the bottom. Rogers was one of those additions, having been acquired from the Marlins on Tuesday.

He doesn’t yet have an Orioles bag, and he doesn’t know who most of his teammates are, he and catcher Adley Rutschman only introducing themselves to each other in a pregame meeting. He didn’t even meet his manager until a few hours before he took the mound, Brandon Hyde deciding to throw Rogers out there on his first day because, he put simply, it was on schedule for him.

Perhaps a bit more time to get acquainted before facing the best team in the American League would have been beneficial. Rogers made it just 4 1/3 innings, allowing five runs as the Guardians won the opener of a four-game series 10-3. It was Rogers’ worst start since May 4 and his second worst of the season.

“It was definitely a whirlwind today, something that I really haven’t been through before,” Rogers said. “I’m not going to sit here and make excuses. I still have to execute the game plan. I really didn’t give my team a chance today.”

It is impossible to judge a trade by just one start, especially for a player like Rogers, whom the Orioles have under team control for the next 2 1/2 seasons. They did not bring him in to be their ace this year — they already acquired Corbin Burnes for that purpose — but rather to fill the back end of their rotation after Tyler Wells, John Means and Kyle Bradish suffered season-ending injuries. Rogers likely would not even start a playoff game, his purpose for now just to help the Orioles get there.

The Orioles believe Rogers, an All-Star in 2021 and rookie of the year runner-up, can overcome the injuries that plagued him for the past two seasons and be a strong contributor for years to come. Thursday may not have showcased his best stuff, but it was one of what they hope will be many more outings to come.

“Coming to this organization, right in the dog days of baseball, playing some really fun baseball the last two months is something that I really haven’t been able to be a part of after being hurt all of last year,” Rogers said. “I’m just fired up to be here and really looking forward to the last two months.”

His first Orioles start was taxing from the first pitch. He gave up a single to Steven Kwan, then a double to Lane Thomas to open the bottom of the first. Both of them would score as the Guardians took a 2-1 lead.

The second would be his only 1-2-3 inning. In the third, he gave up a double and a walk before David Fry took him deep for a three-run homer. His pitch count escalated from the long innings. Rogers would make it just one out into the fifth before his day was done.

“He gave up a couple there in the first and then just a bad fastball to Fry for a three-run homer in a 3-2 count,” Hyde said. “I guess he was trying to go in but just left it right in the middle of the plate. ... That was tough. We didn’t come back from that offensively. We didn’t swing the bat well. Wasn’t our best game on the mound.”

Albert Suárez, whose rotation spot went to Rogers, took over, allowing two runs in 1 2/3 innings. Jacob Webb also struggled against the Guardians’ high-powered offense, giving up a three-run home run.