Here is St. Louis' selection in each round, as well as a letter grade for each pick:
Round 1 (Pick No. 2 overall): T Greg Robinson, Auburn
Greg Robinson is the best run-blocker in the entire draft, which is perfect for St. Louis' run-first mentality. He has the elite athleticism teams look for in a top pick, and he'll eventually develop into a reliable pass-protector.
Robinson was the best player available at No. 2 overall, so this is a perfect selection.
Round 1 (Pick No. 13 overall): DT Aaron Donald, Pittsburgh
The Rams had one of the most frightening 4-3 defensive fronts in football last season, so this pick did not exactly fill a need, but how can anyone argue against adding a talent such as Aaron Donald?
This monster is a sack machine, can run the 40-yard-dash in under 4.7 seconds (at nearly 290 pounds) and posted a combine-high 35 reps on the bench press, per NFL.com.
Donald is the final piece to the 21st century version of the Fearsome Foursome. Not to mention, he was the best player available at No. 13 overall.
Round 2 (Pick No. 41 overall via Buffalo): DB Lamarcus Joyner, Florida State
At 5'8" and 184 pounds, Lamarcus Joyner is a bit undersized, but if we've learned anything from Bob Sanders and Tyrann Mathieu, it's that big things can come in small packages.
Joyner is not afraid to tackle, despite his size, and he's a natural playmaker. He can jump routes, secure interceptions and even return kickoffs.
The Rams were hurting for cornerback depth entering the draft, so Joyner is the perfect solution to that problem.
Round 3 (Pick No. 75 overall): RB Tre Mason, Auburn
Zac Stacy emerged as St. Louis' workhorse back as a rookie last season, but there's no such thing as too many backs in St. Louis' run-first offense.
Mason was highly productive at Auburn—with 1,816 rushing yards and 23 touchdowns—and has experience running behind Robinson. His chemistry with Robinson in the run game will be a huge asset.
Round 4 (Pick No. 110 overall): S Maurice Alexander, Utah State
The Rams were in desperate need of a safety entering the draft, so this pick fills a need, but few experts had "Mo" Alexander as a mid-round prospect.
Alexander is a hard-hitter—something defensive coordinator Gregg Williams loves—but the Rams needed a coverage safety more than another hitter.
Round 6 (Pick No. 188 overall): CB E.J. Gaines, Missouri
Talk about a high-value selection.
E.J. Gaines was one of the best cornerbacks in the SEC last season. He has tremendous versatility as a cornerback and can line up all over the field.
The hometown favorite solidifies St. Louis' depth and helps turn the cornerback position into a team strength.
Round 6 (Pick No. 214 overall): QB Garrett Gilbert, SMU
The Rams picked up free-agent quarterback Shaun Hill as the team's new No. 2 quarterback, but the Rams need a better long-term option.
Garrett Gilbert was a underachiever for most of his college career, but he showed signs of life in his final season with Southern Methodist. He passed for 21 touchdowns, seven picks and over 3,500 yards.
At 6'4" and 221 pounds, he has great size for an NFL passer. With a few years of development under his belt, there's a chance the late-bloomer will eventually become a decent pro passer.
Round 7 (Pick No. 226 overall): T Mitchell Van Dyk, Portland State
Since Robinson and Rodger Saffold are both penciled in as guards for the Rams, the team needs more depth behind starting tackles Long and Joe Barksdale.
Van Dyk is a nice under-the-radar pickup. He'll have to outplay Sean Hooey and Mike Person for a roster spot, but he certainly has a chance.
Round 7 (Pick No. 241 overall): S Christian Bryant, Ohio State
Safety Christian Bryant was one of the more alluring late-round defensive backs, so he was worth a flyer in the seventh round.
With Bryant and Alexander added to the roster, the Rams will have solid competition in the secondary during training camp.
Round 7 (Pick No. 249 overall): DE Michael Sam, Missouri
Michael Sam finished his 2013 season with an SEC-high 11.5 sacks and 19.0 tackles for loss. As a result, Sam was named as the SEC Co-Defensive Player of the Year.
The SEC, of course, is the toughest division in college, so it's not everyday a team can draft an award-winning player from that division in the final round.
Sam is a tweener in the 4-3 system, but he offers tremendous value as a pick.
Round 7 (Pick No. 250 overall): C Demetrius Rhaney, Tennessee State
The Rams have Scott Wells penciled in as the starting center, but the 33-year-old veteran has missed 13 starts in his last two seasons and is reaching the end of the line.
Demetrius Rhaney gives the Rams some solid depth behind Wells. Rhaney, at the very least, will have to prove he's a better center than Barrett Jones if we wants to make the roster.