ARLINGTON -- Pitching was once again an issue for the Rockies as they were swept by the Rangers on Sunday afternoon.

After surrendering 18 runs through the first two games of the series, Colorado dropped the series finale, 13-3. On Sunday, it was right-hander Connor Seabold who struggled to limit offense.

Seabold, 27, has moonlighted as both a starter and a reliever in the Majors, but he got the starting nod against the Rangers as the Rockies deal with a rash of injuries. In his fourth start of the season, Seabold tossed just 3 2/3 innings, surrendering five runs and striking out five batters.

Following the loss, Seabold mentioned his frustration at not being able to retire hitters after getting ahead in counts.

“I was getting guys 0-2 or 1-2 but just couldn’t put them away,” Seabold said. “And they were putting up good at-bats, too. They were making me work for it. But when you face a team that’s hitting really well and you get them to two strikes and can’t get an out, any mistake you make is going to be crucial.”

All five of the runs allowed by Seabold came in the second inning, when the right-hander unraveled against a potent Rangers lineup.

Josh Jung helped Texas draw first blood with a 405-foot solo home run to left field. Following a two-run double by Marcus Semien, Seabold was taken deep once again. This time, it was Corey Seager doing the damage, as he broke the game open with a two-run home run that gave the Rangers an early 5-0 lead.

“We caught them at the wrong time, as far as how well they are swinging,” said Rockies manager Bud Black. “They fought a lot of pitches off and [Seabold] got to 0-2 [repeatedly] and just couldn’t make that critical pitch to stop the bleeding, and they ended up getting five [runs].”

Seabold, who took the loss Sunday, is now 1-1 with a 6.50 ERA through 18 innings as a starter this season. His start marked the fourth consecutive game in which a Rockies starter has allowed at least four earned runs and the fifth such instance in their past six games. Despite the loss, Black applauded the way Seabold bounced back after a rough second inning.

“It was a tough day for Connor. … He battled, though,” said Black. “His pitch count was elevated a bit in the second inning, but he hung in there and competed hard.”

Seabold shared a similar sentiment after the game, stating that he doesn’t feel as though any changes to his approach need to be made and instead believes hard work will inspire improved results.

“I just [have to] keep working,” Seabold said. “I don’t think there’s any monumental changes that need to be made. We’ll figure it out eventually. … Just got to keep plugging away.”

Unfortunately for the Rockies, the struggles weren’t limited to the starting rotation, as the bullpen floundered in the series finale. En route to a lopsided double-digit loss, Colorado relievers allowed eight runs on eight hits against Texas. Six of those runs came in the bottom of the fifth inning and were charged to right-hander Matt Carasiti.

Carasiti was selected from Triple-A Albuquerque on Sunday with the hope that he could help fortify the bullpen, but the club will have to wait at least one more game for that to come to fruition.

Offensively, it was another quiet night for the Rockies’ bats, as they were held to just three runs. On the bright side, the heart of the lineup -- Kris Bryant, Randal Grichuk and Mike Moustakas -- went a combined 4-for-9 with two walks and an RBI.

Hopefully, as the team turns its attention to the upcoming seven-game homestand, the engines of the offense can continue to heat up.