Trey Lance: From drive to drive, just have to execute better

49ers quarterback Trey Lance finished Sunday's preseason game against the Raiders 10-of-15 for 112 yards with a touchdown, good for a 111.0 rating.But Lance and the offense got off to a rough start with three three-and-outs to open the contest. Lance was sacked three times in that three-drive span, and a fourth time later in the second quarter. Plus, Lance's touchdown pass arguably should've been an interception, as it went off a Raiders defender's hands and Ross Dwelley was there to save the play for an accidental touchdown.Lance had at least one more pass that went right off a Raider's hands that could've been picked.Head coach Kyle Shanahan said postgame that the offense as a whole was sloppy early. And while Lance said he needed to look at the film to get a better gauge of his performance, he acknowledged a need for improvement."I mean, it doesn't feel good to go three and out, especially to start the game," Lance said in his postgame press conference. "So, that was definitely frustrating, but I obviously put it on myself to continue to be better, make sure the guys around me are ready to go, I'm ready to go. It starts with me, so I put that on myself."The 49ers scored their...