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8/10/2014 7:45 P.M. ET

Injury changes Dipoto's offseason approach

ANAHEIM -- One of the unfortunate circumstances of Tyler Skaggs' impending Tommy John surgery -- and there are plenty of them -- is the timing.

Skaggs' injury occurred late in the afternoon of July 31, roughly four hours after the non-waiver Trade Deadline came and went, leaving the Angels with only the August waiver wire in hopes of adding to a starting rotation that can now use some help.

"August is what it is," general manager Jerry Dipoto said of a time when pitchers must clear waivers before getting traded. "The idea in August is you have the opportunity to help your club out, but you can't change the fortunes of an organization in a short period of time."

Dipoto said Skaggs' injury, which will keep him out until the start of the 2016 season, "certainly changes our approach for the winter as far as being cognizant of that back-of-the-rotation swing guy on a shorter contract."

But he doesn't expect them to be a player for top-of-the-rotation arms like free agents Max Scherzer or Jon Lester.

"Our model is what you are looking at," Dipoto said. "We feel like we have front men, we have middle men, we have back-of-the-rotation starters. We will try to create as much depth as we can, both with back-of-the-rotation starters and bullpen.

"I don't know too many circumstances where your young starter gets hurt and you are compelled to go chase the top of the market. We'll stay focused on the type of model we've set up."

That model includes a very deep bullpen, which was bolstered by the additions of Jason Grilli and Huston Street, and a starting rotation built around Jered Weaver, C.J. Wilson and Garrett Richards. The Angels need Wilson to bounce back from the 11.03 ERA he's posted over his past six starts, will hope Matt Shoemaker and Hector Santiago continue to pitch well, and will look to left-hander Wade LeBlanc as their first option out of Triple-A.

The Halos look to the waiver wire for potential depth, but they can't necessarily count on much.

"This is how we were built," Dipoto said. "It was working very well. Unfortunately, we can't protect ourselves from every injury."

Pestano notches three strikeouts in debut

ANAHEIM -- Reliever Vinnie Pestano made his Angels debut in Sunday's 3-1 loss to the Red Sox, striking out three batters and walking another in a scoreless frame.

"I was good to see Vinnie get out there," manager Mike Scioscia said. "We haven't seen him in a couple years, but when he was with Cleveland, this guy was tough. Looks like his velocity picked up a little bit, maybe not where it was a couple years ago, but you could see he has deception. Good to see him get an inning out there."

The Angels added Pestano and righty Caleb Clay to their roster on Sunda, hours after exhausting their bullpen in a 19-inning, 5-4 win over the Red Sox on Saturday night.

First baseman C.J. Cron and right-hander Cam Bedrosian were both optioned to Triple-A Salt Lake, and Tyler Skaggs, who will undergo Tommy John surgery, was transferred to the 60-day disabled list to open up a spot on the 40-man roster for Clay.

The Angels acquired Pestano from Cleveland on Thursday in a trade that brought the Newport Beach, Calif., native and Cal State Fullerton product back to Southern California.

In 14 games this season, Pestano has a 4.50 ERA but struck out 16 batters in 10 innings. In Triple-A, Pestano registered six saves and a 1.71 ERA.

From 2011-12, Pestano posted a 2.45 ERA for the Indians in 137 relief appearances.

Clay, meanwhile, has never appeared in a Major League game and spent the first half of this season pitching in South Korea for the Hanwha Eagles.

The Angels signed Clay to a Minor League contract on June 21 after the right-hander went 3-4 with a 8.32 ERA with Hanwha. In Triple-A Salt Lake, Clay went 3-3 with a 3.78 ERA in eight starts over 52 1/3 innings.

After relief outing, Shoemaker's start pushed back

ANAHEIM -- Saturday night's 19-inning seemingly endless game against the Red Sox not only forced Angels starting pitcher Matt Shoemaker into an emergency relief appearance, but also shook up the upcoming rotation.

Shoemaker was set to start Tuesday's series opener against the Phillies, but he will be pushed back until next Saturday after throwing 102 pitches on Wednesday and 41 in Saturday's 5-4 victory. He earned the win against Boston with three innings of perfect relief.

C.J. Wilson will take Shoemaker's place on Tuesday and Jered Weaver will take the mound on Wednesday. Garrett Richards, meanwhile, will start the series opener in Texas on Friday.

If the Angels keep the same rotation order during their next 17-game stretch -- which includes seven games against division-leading Oakland and finishes with an off-day on Sept. 1 -- they would trot out Hector Santiago, Wilson and Weaver in the three-game set in Oakland from Aug. 22-24.

Manager Mike Scioscia said the club would likely not start a pitcher on short rest in an attempt to match up with an upcoming opponent.

Worth noting

Josh Hamilton was out of Sunday's lineup after playing 19 innings in center field Saturday and going 1-for-8. Hamilton did pinch-hit in the bottom of the ninth, though, striking out to end the game. He has one hit in his last 25 at-bats.

Scioscia said Hamilton, who had homered three times in a seven-game stretch recently, simply needed a "refresh day."

"Even his batting practices were different than he had taken just three or four weeks ago," Scioscia said. "He just feels in sync more, it just hasn't translated into production."

Mike Trout's eighth-inning homer on Sunday was his 27th of the season, which matched his 2013 total and set a new Angels record for home runs from the lineup's No. 2 spot.

• When he entered in the ninth inning Sunday, Pestano became the Angels' 30th different pitcher used this season, breaking the franchise record of 29 in 1996.

Mike Morin threw off a mound on Sunday for the first time since suffering a left foot laceration last weekend in Tampa Bay. Morin said he felt good after about 15 pitches and expects to be activated Saturday in Texas.

• The Pirates claimed former Angels infielder Tommy Field, who played in 15 games, on Sunday, three days after the Halos designated him for assignment.

Alden Gonzalez is a reporter for MLB.com. Read his blog, Gonzo and "The Show", and follow him on Twitter @Alden_Gonzalez. Matthew DeFranks is an associate reporter for MLB.com. This story was not subject to the approval of Major League Baseball or its clubs.