As one of the older teams in Major League Baseball on both sides of the ball, it wouldn't hurt for the San Francisco Giants to add some youth in the coming years.

So who's up for an update on the best players in their farm system?

With roughly one week of the 2017 minor league season in the books, it's time for a game of Stock Up, Stock Down featuring the Giants' five best prospects, as ranked by MLB.com. There are only a few ground rules:

• No active major leaguers.
• No injured players.
• No players who haven't played yet.

One notable player covered by these rules is outfielder and No. 4 prospect Steven Duggar. He hasn't yet featured in any games this season. 

Otherwise, the rest of the Giants' top prospects are good to go.

Sandro Fabian, OF

Giants Rank: 6

Overall Rank: N/R

Sandro Fabian was only 16 when the Giants signed him out of the Dominican Republic in 2014. He's now a 19-year-old playing with the Single-A Augusta GreenJackets. 

Translation: He can take his time.

Which is good because time is what he needs. Through seven games with the GreenJackets, he's hit only .241 with a .601 OPS. He's whiffed eight times and walked only once in 31 plate appearances.

This is Fabian living up to one of the less flattering parts of his scouting report from MLB.com: "His biggest need at this point is to be more patient and work deeper counts to get better pitches to punish."

Fabian showed in hitting .340 in rookie ball last year that he has the goods to punish the ball. But the modest .364 on-base percentage he had to go with his average was a symptom of his tendency to swing away. It now looks like a precursor to his slow start this season.

So keep an eye on Fabian's OBP. It will reflect how well (or not) he's adjusting to tougher competition.

Stock: Down

Chris Shaw, 1B

Giants Rank: 5

Overall Rank: N/R

Chris Shaw showed well in the low minors after the Giants drafted him 31st overall in 2015. He had a .911 OPS at Low-A that year and a .902 OPS at High-A in 2016.

He ran into a reality check upon joining the Double-A Richmond Flying Squirrels, hitting just .246 with a .309 OBP. Not too surprising given the general perception that his hit tool lags behind his power tool. Young hitters such as these must adjust to survive.

So far, so good for Shaw with Richmond this season. Although he only has a .269 average through eight games, he also has a .387 OBP and .849 OPS. He notably has only one more strikeout (five) than he does walks (four).

While the lack of hits is a bummer, the fact three of Shaw's seven hits have gone for extra bases (two doubles, one home run) is a fair trade-off. That's going to be his thing in the long run.

"He has the potential to be a 30-homer guy," said Shane Turner, the Giants' director of player development, according to Josh Jackson of MiLB.com.

It's far too soon to say the 23-year-old has put it all together. But with a good approach developing and his power still working, he's getting there.

Stock: Up

Bryan Reynolds, OF

Giants Rank: 3

Overall Rank: N/R

Albeit at No. 59 overall, Bryan Reynolds was the first pick the Giants made in the 2016 draft. The Vanderbilt product started hitting immediately, putting up a .313 average and an .847 OPS in the low minors.

So it goes for Reynolds with the High-A San Jose Giants early in 2017. In seven games, he has a .290 average.

The downside is that each of the 22-year-old's nine hits has been a single. That points to a lingering question about how well he's cut out to drive the ball.

However, he makes up for that not just with his ability to hit for average but also his ability to get on base in general. He's following up last year's solid .363 OBP with a .405 OBP out of the gate this year. He's drawn five walks in his 37 plate appearances.

Whether this can last remains to be seen. If Reynolds continues to hit only singles, he could find himself coming up against more aggressive pitchers as the competition gets tougher.

For now, though, it's hard to take issue with how Reynolds is handling himself.

Stock: Up

Christian Arroyo, INF

Giants Rank: 2

Overall Rank: 85

With 349 games and 1,552 plate appearances under his belt in the minor leagues, Christian Arroyo is the Giants' most MLB-ready top prospect, if nothing else.

As if to further prove the point, he's hitting .407 with a 1.078 OPS through seven games with the Triple-A Sacramento River Cats. He has a hit in every game.

The word of warning is that Arroyo is still mostly living up to this part of his MLB.com scouting report: "If he were to become more selective at the plate and look to drive the ball more often, his biggest proponents believe he could develop at least average power."

With only one walk this season, Arroyo has walked in only 5.8 percent of his minor league plate appearances. He also has only three extra-base hits, bringing his career slugging percentage to just .425.

Still, the 21-year-old's bat looks good enough for a utility infielder type.

That's all the Giants need Arroyo to be as long as they have Brandon Crawford at shortstop. By continuing to get work at second base and third base in addition to shortstop, Arroyo is doing what he needs to do to earn a call-up at some point this season.

Stock: Up

Tyler Beede, RHP

Giants Rank: 1

Overall Rank: 85

The reality check Tyler Beede got in his first full professional season in 2015 continues to fade from memory.

The 23-year-old made his Triple-A debut against the Tacoma Rainiers (the Seattle Mariners' Triple-A affiliate) on Sunday and was sharp for six innings. He allowed one run on five hits and no walks, striking out three.

"He was in control throughout," River Cats manager Dave Brundage said, per MiLB.com. "He never lost his composure, even when they threatened. Overall, a nice start in his Triple-A debut."

This is coming on the heels of an impressive showing in spring training, as Beede put up a 2.03 ERA in six appearances. And that followed an impressive 2016 season in which he had a 2.81 ERA in 24 starts at Double-A Richmond.

It's all washing away the bad taste left by the pedestrian 3.97 ERA Beede put up across two levels in 2015. The experience exposed various flaws in his game that have since been addressed.

If Matt Cain can pitch well at the back end of the Giants' major league rotation, they won't have a need for Beede. But since that's a sizable "if," odds are he will be seen in the majors before long.

Stock: Up

Data courtesy of MiLB.com, Baseball Reference and FanGraphs.