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DAVIE — After only four training camp practices, Miami Dolphins coach Brian Flores has fired offensive line coach Pat Flaherty.

Flaherty is a Delone Catholic High School graduate with a long and successful background on both the NCAA Division I and NFL levels. He is best known for coaching the New York Giants offensive line from 2004 through 2015. The Giants won two Super Bowls during that period.

Flaherty still has family in the McSherrystown area and annually holds the Mason-Dixon Linemen Clinic at Delone.

Miami is promoting Dave DeGuglielmo, a club consultant who will now begin his third stint as line coach with the club.

Flaherty was hired in February, after 19 years of coaching in the NFL, including 15 at offensive line. On Monday, Flaherty spoke with reporters during a scheduled appearance of assistants.

"I tell them each and every day on the offensive line: 'You guys will develop the depth chart. We as a staff will give you what the depth chart is, but your play dictates it,'" Flaherty said on Monday.

Football decision: This was a football decision by Flores and had nothing to do with any off-the-field concerns about Flaherty, according to a league source. Flores will likely expand upon the decision in his scheduled availability before Wednesday's practice.

Now, DeGuglielmo, Flores and offensive coordinator Chad O'Shea will determine the depth chart. In 2014, Flores was the safeties coach and DeGuglielmo was the offensive line coach for the Super Bowl-winning Patriots.

Miami has a standout at left tackle, in Laremy Tunsil, and solid veterans with center Daniel Kilgore and guard Jesse Davis, but overall, there are questions about the line, which has not performed well during training camp.

The Dolphins are hoping rookie guard Michael Deiter will make an impact this season. Miami is hoping right tackle Jordan Mills will prove a worthy starter. And the Dolphins are hoping veteran Chris Reed will be sturdy, either as a starting or backup player.

Things were going well in May: After Flaherty's arrival, he spoke about his plan to help develop an aggressive mentality. In May, he said things were going well.

"I really enjoy coaching those guys because they come in, they listen, they pay attention to detail," Flaherty said. 'I'm really excited about."

Whether it was the intent of not, Flores is making a strong statement early in his Dolphins career. If he wasn't pleased with Flaherty, he acted without hesitation to remedy the situation.

Coaching staff already thin: Flores is already without two planned full-time members of his staff.

Earlier this month, assistant head coach and quarterbacks coach Jim Caldwell began a medical leave, though he will still consult with the club.

DeGuglielmo was offensive line coach for the Colts last season, where he mentored rookie guard Quenton Nelson, who was All-Pro and a Pro Bowler.

DeGuglielmo has 30 years of coaching experience and has been on the staff of two Super Bowl champions, the Giants in 2007 and the Patriots in 2014.

He was Miami's offensive line coach from 2009-11 and also stepped in after Chris Foerster's firing in 2017.

Asked in March about Miami's offensive line play, Flores said: "A lot of the things on the offensive line is about getting those five guys and creating a cohesive group there. Between our center, guards, tackles and the mixture of guys who are working together, I think kind of building that camaraderie is definitely a big part of this phase."

Miami's offensive line will now attempt to build cohesion and camaraderie with a new leader.

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