EAST RUTHERFORD, N.J. – The Giants' newest offensive lineman stepped off a plane long enough to participate in his first practice with the team today.

Okay, that's a bit of an exaggeration. But Jamon Brown has been crisscrossing the country since the Giants were awarded him off waivers on Halloween, one day after he was released by the Los Angeles Rams and just as the Giants were about to embark on their bye week break. The Giants returned to work today, and Brown was on the field.

"It's been crazy," Brown said. "You're in L.A. on Tuesday, you fly to New York on Thursday. Obviously, it was the bye week. So you fly back to L.A, and then you come back on Sunday, and here we are. One practice in it. I went back and forth twice, and then we'll go back to San Fran (laughter). So, my frequent flyer miles are out the roof right now."

Of more importance to the Giants is whether Brown can catch up fast enough to play against the 49ers in San Francisco on Monday night.

"I can't really focus on that," said Brown, who is listed at 6-4 and 340 pounds. "My approach is to take it a day at a time, to learn and soak in as much as I can, as fast as I can, and be ready when coach calls on me."

Coach Pat Shurmur didn't rule out Brown starting against the 49ers.

"It's a possibility," Shurmur said. "He's only been here hours, it's not even days yet, but what he's done and how quickly he picks things up, there's a chance he could be in there.

"He was here all day yesterday, and he's picked things up fairly quickly. You saw he was out there already, and I think (line coach) Hal (Hunter) and (assistant) Ben (Wilkerson) have done a good job getting him up to speed. We're going to try to get him in there as quickly as possible. This guy started the whole season, had a little incident where he's no longer starting, and we were thrilled he was available. He's a big man, he's athletic, and he certainly looks the part in some of the reps I saw today. We'll get him up to speed quickly."

Giants linebacker Alec Ogletree practiced against Brown during their three seasons as Rams teammates.

"He's a big dude, for sure," Ogletree said. "He's a hard-worker. Definitely a competitor. A guy that brings attitude. He moves stuff around. I think he'll be a big help for us, for sure. … He's a good player. I definitely saw the growth that he's shown over the years. He was starting at one point, but ended up not playing the first four games, and came back and kind of didn't get back on the field. They let him go. I'm glad they did, because we picked him up. Definitely looking forward to him bringing that attitude and a sense of leadership that we need, for sure."

Brown played six games for the Rams in a reserve role this season. Last year, he was the starting right guard for all 16 regular-season games, plus the NFC Wild Card Game, for Los Angeles. Brown, who was a third-round draft choice in 2015, was released when the Rams acquired defensive end Dante Fowler in a trade.

Brown was asked if he was "blindsided" by the Rams' decision to waive him.

"Most definitely, I think anyone would be in a situation like that," he said. "It's kind of the belly of the beast. At any given time, you can be in one place, and then the next day a new place. Yes, it was shocking. I think it was shocking even to them for making that move, just based on the conversations I've had with some of the staff members in the organization. At the end of the day, the dream lives on. I have another opportunity right here in New York, and I'm going to make the most of it."

*The Giants today activated rookie defensive tackle RJ McIntosh from the reserve/non-football illness list and waived wide receiver/return specialist Quadree Henderson.

McIntosh, a 6-4, 283-pounder from the University of Miami, was the Giants' fifth-round draft choice this year. An illness prevented him from participating in training camp practices or playing in a preseason game. McIntosh returned to practice on Oct. 16. Had the Giants not added him to their roster today, McIntosh would have been ineligible to play this season.

In three seasons with the Hurricanes, McIntosh played in 31 games with 26 starts. His career totals included 103 tackles (51 solo), 23 tackles for losses and 5.5 sacks. He joins a defensive line that includes Dalvin Tomlinson, B.J. Hill, Josh Mauro, Kerry Wynn, Mario Edwards, Jr. and John Jenkins.

"I want to be able to help them out with that and be a big factor on the D-Line," McIntosh said. "That's my goal, to come out and immediately be a big factor.

"I'm a hard working guy. I think my specialty is pass rushing and I want to be able to be a big factor in that and also be an all-around guy. Help the D-Line room, help the defense and hopefully I'm a big factor in that."

"He will fit into the rotation, we'll see how he progresses," Shurmur said. "He's done a good job so far, we're just learning about him. We'll just see how much he can handle. We feel like he's got a future, we had to deal with a medical issue that we were not aware of when we drafted him, so we helped rectify that. As long as he's a Giant, we're working with him and we're looking forward to seeing him do good things."

Henderson was signed to the Giants' practice squad on Oct. 4 and to the active roster on Oct. 21. He played in two games and averaged 7.8 yards on six punt returns and 22.4 yards on five kickoff returns.