PHILADELPHIA -- Cubs catcher Welington Castillo quickly made his way around the visitors' clubhouse at Citizens Bank Park on Saturday afternoon.

The 25-year old was on a whirlwind tour after he got the call to join the Cubs on Friday night when Steve Clevenger suffered a right oblique strain and was placed on the disabled list on Saturday. Castillo not only arrived in Philadelphia from Triple-A Iowa on Saturday, he was promptly inserted into the starting lineup for the game against the Phillies due to Geovanny Soto dealing with back tightness.

"He's more of an everyday catcher, and that's what he was doing in Iowa, so we'll probably use him more," Cubs manager Dale Sveum said. "He'll start tonight, just because we'd prefer not to have [Soto start] and the back flare up, then we're with one catcher the rest of the game."

Castillo hit .286 (65-for-227) with 15 home runs last season in the Pacific Coast League. This year, he's hitting .320 (16-for-50) with four doubles and a pair of home runs with Iowa.

Clevenger placed on DL with oblique strain

PHILADELPHIA -- Given the chance to feel sorry for himself, Cubs catcher Steve Clevenger, who was placed on the 15-day disabled list, instead remained focused on the next step as he faces the first injury of his career.

"As of right now, I'm going to head back to Chicago and get all my treatment in and go from there and do whatever they tell me to do," said Clevenger, who injured his right oblique during batting practice before Friday night's 5-1 win over the Phillies at Citizens Bank Park. "You can't really get too frustrated. That's baseball. I am a little disappointed, but you can't dwell on that. You just have to get healthy and get back ready to go."

"The concerning part about [Clevenger's] injury -- when I've had run-ins with this sort of thing -- is when they have trouble talking or coughing, it's usually more than a couple of weeks," manager Dale Sveum said.

Clevenger made the team out of Spring Training as the backup to Geovanny Soto. In 10 appearances, he is batting .500 (11-for-22) with five doubles. Now, Clevenger faces the uncertainty of an injury he's never experienced before and a stint on the DL.

"I never had an injury just out of nowhere. It's a big shocker," Clevenger said. "I really have no idea, so what they tell me is on me, and I'm going to do everything I have to do to get back on the field. I haven't taken any tests yet. I've heard a lot of bad things about the oblique area."

His eagerness to stay with the team may have hurt the Cubs on Friday, as he waited to tell the coaching staff what was going on until he went to the cages in between innings. Compounding matters was the fact that Geovanny Soto felt tightness in his back, but things worked out.

"We didn't know," Sveum said. "I told [Soto] he better not get kicked out. I'm not sure who would have caught. Probably [Darwin] Barney. He caught in high school."

Worth noting

• Geovany Soto didn't start on Saturday after he felt tightness in his back on Friday night.

"Yesterday, after a walk against [Roy] Halladay, I felt it tighten up a little bit," said Soto, who has struggled at the plate with one home run and a .135 average. "I hit today and felt fine, but they told me to rest it today and see tomorrow, but I'm totally fine. If they need me, I can go. If the need me off the bench."

• Manager Dale Sveum indicated that Ryan Dempster, on the 15-day DL with a pulled right quad, will be ready to make his next start on Thursday in Cincinnati. That means Saturday night's starter, Randy Wells, will be in limbo until a final decision is made sometime this week.

• In the Cubs' last six games, their starters have recorded a 2.13 ERA in 55 innings. Over that time, the Cubs have won four times.

"We've pitched really well, but we've also hit in key situations," Sveum said. "We haven't hit a lot, but we've hit enough."