SANTA CLARA https://www.49ersfanshop.com/Aaron-Burbridge-Jersey , Calif. (AP) — San Francisco coach Kyle Shanahan knew things wouldn't always go quite as smoothly for Nick Mullens as they did in his first start.So when Mullens followed up his record-setting debut with a spottier performance that included two interceptions and a failed late drive, Shanahan wasn't overly concerned and remains committed to Mullens as the starter when the team returns from the bye next week."I think it's a positive experience," Shanahan said Tuesday. "The guy's played one game in his career. I know statistically that was the best start in NFL history. I mean, I think Nick did some real good things yesterday, too. It was a little bit more of a challenge in some circumstances. … What I liked about Nick is he never seemed rattled throughout the whole game, continued playing. He was great after the game. He was great watching film with him. I say it's a good experience or step forward because I think he'll get better from each experience he has." Just about everything went right for Mullens in his debut against the Oakland Raiders on Nov. 1 Kyle Juszczyk Jersey , when he joined Hall of Famers Jim Kelly and Fran Tarkenton as the only players with at least 250 yards passing, three touchdown passes and no interceptions in the first career game. He also had the most efficient debut since the merger for a player with at least 20 attempts, posting a 151.9 rating in the 34-3 win.It wasn't quite like that in a 27-23 loss to the New York Giants on Monday night. Mullens went 27 for 39 for 250 yards with one touchdown and two interceptions.He helped San Francisco (2-8) build a 10-point lead in the second half before the team blew it. Mullens then drove the Niners to the 21 in the closing minute before his last-ditch pass sailed out of the back of the end zone to send San Francisco to another loss.Mullens' best play came in the third quarter when he went through several reads before finding running back Matt Breida for an 11-yard touchdown pass that made it 20-10.But there were also some mistakes, like a slightly off-target pass to Marquise Goodwin that led to an interception in the second half and a late throw to Kendrick Bourne that led to an earlier pick in the first half that set up a New York touchdown."I thought he did some decent things last night," Shanahan said. "He's a good pocket passer, so I want him to be perfect at it. He was pretty good on a number of his reads. He had a touchdown get into the last guy in his progression. Had a couple big plays Tom Rathman Color Rush Jersey , getting into number two and three. But, I want him to be automatic. I know that's what he wants to do, too. And we'll keep working at it until he is."The 49ers should be healthy when they return from the bye with Shanahan predicting that everyone on the roster should be available to practice next week. That includes linebacker Reuben Foster, who missed the past two games with a hamstring injury, as well as receiver Pierre Garcon (knee) and safety Jaquiski Tartt (shoulder), who sat out Monday with injuries.Defensive backs K'Waun Williams (stinger) and receiver Goodwin were banged up in the game against the Giants but aren't expected to miss any time. Who’s up and who’s down? Taking stock of the 49ers after Day 6 of training camp." 49ers Training Camp 2019Stock report from Day 6 of 49ers training campNew https://www.49ersfanshop.com/Pierre-Garcon-Jersey ,90commentsWho’s up and who’s down? Taking stock of the 49ers after Day 6 of training camp.PDTThe competitive juices were flowing for the San Francisco 49ers’ sixth practice of training camp. In what’s typically a one-sided affair one way or the other, Friday saw both sides of the ball finding their time to shine. Kyle Shanahan’s offense was successful during the first team portion, while Robert Saleh’s defense turned it up in the red zone and during a final move-the-ball period.Here’s our stock report after Day 6 of the 49ers training camp:Stock up: DL Nick BosaThe 49ers’ No. 2 pick put on a show on Friday. He bested Mike McGlinchey during 1-on-1s, flying around the second-year tackle to claim his sack against the simulated quarterback. He didn't disappoint during team drills, either. Bosa beat McGlinchey again on third down of a move-the-ball period, sacking Garoppolo to halt the first-team offense’s drive. He also beat Staley with an inside move during the next series Earl Mitchell Jersey , prompting praise from the veteran. Bosa and Staley have battled back and forth since the start of camp. Stock down: OT Mike McGlincheyThe No. 9 pick from 2018 struggled against the 49ers’ second-overall pick this year in both individual and team portions of practice. It was a rough day for McGlinchey, who’s otherwise had a strong camp. He’s put on tape more than a few impressive reps against defensive lineman Dee Ford but wasn’t able to do the same against Bosa on Friday. Something tells me he and Staley and going to be sharing notes after Bosa’s strong showing.Stock up: LB Fred WarnerWarner has been a stable leader in the middle of the 49ers defense. He’s routinely around the ball during the team portions of practice. On Friday, at the start of team drills, Warner read the run play perfectly and blasted Tevin Coleman in the hole as he ran right. He also ran step-for-step with Coleman on a deep wheel route later in practice, blanketing the running back as the ball fell incomplete just out of reach. Warner looks like the anchor of the 49ers’ linebacking corps as Kwon Alexander works toward additional reps.Stock down: CB Ahkello WitherspoonWitherspoon had an off day on Thursday; his stock took a hit for the first time of an otherwise impressive training camp. It takes another fall on Friday, as he left practice with a glute injury after the 1-on-1 portion of practice. Perhaps the injury played a factor in his struggles the day prior. Witherspoon’s absence opened the door for fellow cornerback Jason Verrett Malcolm Smith Color Rush Jersey , who authored an impressive pass breakup while covering Marquise Goodwin during 11-on-11s. Witherspoon and Verrett are in competition to start opposite Richard Sherman.Stock up: WR Kendrick BourneBourne has done everything in his power to earn a spot on the 49ers roster for the third year in a row. The team added wideouts Deebo Samuel and Jalen Hurd in the second- and third-round, especially, in the 2019 NFL Draft. Typically, that’d spell the end of an undrafted free agent’s tenure. Bourne has had a strong camp though and is firmly in the mix for a spot. He scored one of two touchdowns during the red zone period on a pass from CJ Beathard. He also made a diving reception during team drills over the middle of the field from Jimmy Garoppolo.Stock up: AtmosphereThe 49ers’ coaching staff and players have done a good job maintaining the competitive fire through six practices. Typically at this point, the energy level begins to dip as the monotony grows and exhaustion sets in for players pulling 14-16 hour days. So far, none of that has been apparent. Both sides of the ball seem focused https://www.49ersfanshop.com/Robbie-Gould-Jersey , maintaining the edge it takes to make plays in this type of environment consistently. The competition between the offense and defense has become a must-watch. It speaks to the atmosphere that’s been built by the team.