A second night of hefty swings by Raul Ibanez has positioned the Mariners to complete their first sweep of the season.

The Mariners will send Hisashi Iwakuma to the mound Wednesday afternoon looking to sweep a reeling Chicago White Sox club in a free fall with no end or any real offense in sight. Ibanez hit a two-run homer and two-run double the first three innings to pace a 7-4 win Tuesday night for a Mariners club that might need to promote a new catcher quickly.

Jesus Sucre left the game with a hand injury and will be re-examined first thing Wednesday morning after early X-rays might have shown something beyond just bruising. The only catchers in Class AAA are last year’s third overall pick, Mike Zunino, and lesser-known Brandon Bantz, but the Mariners weren’t tipping their hand.

“Jack (Zduriencik) and I just started talking about it and we’re going to talk some more about it after we get done here,’’ Mariners manager Eric Wedge said. “We’re kind of in a pickle here but we’re going to have to try to cover ourselves.’’

While a Zunino promotion would garner national attention, the team is reluctant to rush his development or make him a candidate for early arbitration by promoting him too soon. Neither Zunino nor Bantz is on the 40-man roster, meaning the team will have to remove a player from it regardless of which catcher they’d choose.

The possible Zunino addition – unlikely if only needed for a few days – generated plenty of Internet buzz after a night in which the Mariners again took advantage of a reeling White Sox squad that has dropped eight straight. Mariners ace Felix Hernandez wasn’t at his best early or late, but rode an early offensive eruption to victory.

Ibanez capped a three-run Mariners second inning — erasing a 1-0 deficit — with his two-run blast to right off White Sox starter Jake Peavy. He would later finish Peavy off in the third with his double to help give Hernandez a 6-2 lead on a night he really needed some cushion.

“That’s definitely important,’’ Ibanez said of staking Hernandez to a big lead early. “He goes out there and he battles every time. He competes and obviously he’s a great pitcher, but when you put runs on the board – we know he gave up one early … but we just kept battling back for him.’’