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9/16/2013 8:35 P.M. ET

Duffy scratched because of mild flexor strain

Royals lefty to miss second straight start; Ventura slated to face Indians

KANSAS CITY -- Royals left-hander Danny Duffy doesn't seem to be concerned, even though he's experiencing a setback in his first season after Tommy John surgery.

Duffy was scratched from Tuesday's start against the Indians with a mild flexor strain in his pitching arm. Duffy, who has made five starts since coming back from Tommy John surgery on June 13, 2012, felt some forearm fatigue and tightness after his last outing nine days ago against Detroit, when he worked 4 1/3 innings.

"When Duff threw his last start here, not even the first day, but the second day after his start, he started feeling some mild tightness in his forearm," manager Ned Yost said. "We shut him down from the Detroit start as a precaution and it was starting to feel better. He threw a side and felt good, but at the end of the side, he tried to crank up on it and still felt that mild tightness. We went and got an MRI and it is a very minor flexor strain. We are going to use the utmost caution with him right now coming off Tommy John surgery."

Duffy is 2-0 with a 1.85 ERA.

"It's expected to have setbacks, I'm actually surprised at how good I've felt this whole year without any setbacks," Duffy said. "It's frustrating at this point because we're in the [playoff] chase, but I can definitely have some appreciation for their protection of me."

Duffy said it was a relief to have head athletic trainer Nick Kenney say it wasn't something more serious.

"It was pretty cool to see Nick come back into the room with a smile on his face, because that is not a good feeling to go into the MRI," Duffy said. "We're all good and I'm going to do whatever I can to help this team, however that may be for the rest of the season."

Duffy will undergo treatment and wait for the swelling to go down before throwing again.

"Ned came up to me and told me I'm not shut down, but we are going to take it easy," Duffy said. "When we skipped my start, it was for matchup concerns. I'd faced the Tigers three of my five starts, but then I went up to Nick after my last side and I was a little more tired than I was. I had been feeling like Superman after ever start, bouncing back was really easy for me."

Dwyer to start for Omaha in Triple-A title tilt

KANSAS CITY -- With Yordano Ventura slated to start for the Royals on Tuesday against the Indians, left-hander Chris Dwyer will start for the Omaha the Storm Chasers in Tuesday's Triple-A Championship Game in Allentown, Pa.

Former Royals prospect Jake Odorizzi will get the ball for the Durham Bulls.

The Storm Chasers are coming off their second Pacific Coast League title in three years -- winning three of four in the best-of-five series against Salt Lake. The championship game will air on NBC Sports Network at 6 p.m. CT.

Dwyer was 10-11 with a 3.55 ERA in 29 regular-season games. He pitched two innings last Tuesday in the first game of the PCL championship series -- allowing one run on three hits.

Baseball Equipment Drive set for Wednesday

KANSAS CITY -- The Royals' annual Baseball Equipment Drive will be held at the Royals-Indians game on Wednesday night at Kauffman Stadium.

Fans can help by donating new or gently-used equipment outside the Diamond Club from 5:30 to 7:30 p.m. CT. It will benefit the baseball program at Cristo Rey Kansas City High School for economically-challenged students. It receives no public funds for its educational programs.

The collection will be done by the wives of shortstop Alcides Escobar and pitcher Luis Mendoza, along with Cristo Rey volunteers. In addition, fans may make cash donations in exchange for autographed photo cards or baseballs.

Cristo Rey began its baseball program in 2009 and it grew slowly until 30 students tried out for the team in 2012 and won the school's first game. This year, 60 students tried out for the team, including many who had not previously played baseball.

Mendoza and Escobar are serving as ambassadors for the Baseball Tomorrow Fund which, prior to Monday night's game, presented a grant of $5,000 to Cristo Rey for the purchase of new equipment.

Since its formation in 1999 by the Major League Baseball Players Association and Major League Baseball, the fund has awarded more than 700 grants totaling $24 million to organizations in the United States and around the world, benefiting 330,000 youth players.

Dick Kaegel is a reporter for MLB.com. Kathleen Gier is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.