ALAMEDA -- There were drops, miss-timed throws and at least six passes batted down at the line of scrimmage.
Two of the biggest completions to Marcel Reece and Denarius Moore -- both by presumptive starting quarterback Matt Flynn -- wobbled as if wounded over a duck blind.
If struggles by the Raiders in the passing game is a cause for concern, coaches and players are keeping it well-hidden as the club opened its three-day mandatory minicamp Tuesday.
"I don't allow that to frustrate me," Raiders coach Dennis Allen said following practice. "I understand where we're at in the season. I understand that we've got a lot of new pieces, a lot of new guys working together and I don't concern myself with that.
"I know we've got a lot of work to do, but the way our guys are working, we're going to get where we need to be."
The Raiders have two more practices before going their separate ways before training camp opens at the Napa Marriott on July 25.
With their third offensive system in three seasons -- Hue Jackson gave way to Greg Knapp, who was replaced by Greg Olson -- returning players are starting over again. New players are also working through issues of familiarity and knowledge of the playbook.
Having played most of his career in Green Bay, where the offense stayed the same and the receiving corps was mostly intact, Flynn can see a big difference.
"I'm sure their OTAs and things like that look a lot different because they know everything and now they're just working on different things," Flynn said. "`We're starting with a new offense. Everyone is learning. We're getting there. We're making more plays than we did in Week 1 and we're feeling more comfortable.
"From what I'm seeing, I'm impressed with how much mental work everyone is putting in and how much everyone is believing right now."
Backup quarterback Terrelle Pryor, who by his own count had four passes batted down, took solace in the fact that he made all his protection calls correctly.
"It's about how much you study to get those protection calls down so we can be stress free in the pocket," Pryor said. "I did a great job today getting those calls down."
Pryor credited Flynn with the non-spirals hauled in by Moore and Reece for big plays.
"Sometimes when you see guys like Reece downfield, you've got to think mismatch and make a play," Pryor said. "It's not always going to look pretty."
Said Flynn: "The bottom line was they made the play. Personally you want to make it perfect, the perfect type spiral and everything ... We got the completion. It's something we have to work on. I don't think anything we do out here we're going to be satisfied with right now because we see what we can do as an offense and we see the strides than can be made and what's out in front of us so we're excited about it