Winning both the Golden Spikes Award and Dick Howser Trophy at Long Beach State in 2004, Jered Weaver was the 12^th Overall Pick in that year's Amateur Draft, debuting two years for the Los Angeles Angels of Anaheim, the team that took him.  High expectations were on Weaver, and he did well, warning his spot in the rotation and finishing fifth in American League Rookie of the Year voting.  

Weaver’s best seasons were between 2010 and 2012, where he went to three straight All-Star Games.  Leading the AL in Strikeouts (233) in 2010, Weaver had fewer Ks in 2011, but his ERA dropped to 2.41, and his WHIP was stellar at 1.010.  Weaver, who was fifth in Cy Young voting in 2010, was second in 2011 and would be third in 2012 where he was first in the league in Wins (20), WHIP (1.018), and H/9 (7.0).  

Weaver was still a good Pitcher, leading the AL in Wins in 2014 (18), but he slumped in 2015, with a bloated ERA of 4.64, which got worse in 2016 (5.05).  He joined San Diego as a Free Agent in 2017 but only pitched nine Games before retiring.

The overall Angels record of Weaver is a good one; 150-93 with 1,596 Strikeouts.  

Frank Tanana would be on the first ballot if there were a Hall of Fame for underrated Pitchers.

Tanana played the first eight years of his 21 with the California Angels, and if you were paying attention, you were seeing one of the best hurlers in the American League.  The southpaw was easy to overlook, as the Angels were only in the playoffs once when Tanana was there (1979), and he was on the same staff as Nolan Ryan, so ace status was not bestowed upon him.  

Debuting in 1973, Tanana was in the rotation the following year, going 14-19, but despite the losing record, he had 180 Strikeouts with a decent 3.12 ERA.  Tanana then had three great years, where he was in the top-nine in Cy Young voting, and kept his ERA well under three, including winning the ERA title in 1977 (2.54) and also leading the AL in bWAR for Pitchers (8.3).  In the two years before, Tanana also had a bWAR over seven, was first in SO/BB, and had a Strikeouts Title (280 in 1975).  With what we know of today’s advanced metrics, it is possible that Tanana should have captured the Cy Young, but he was ninth, distantly behind Sparky Lyle of New York.

Tanana's last few years were plagued with tendinitis, and his pitching suffered, but he was still a competent starter and helped California reach their first playoffs in 1978.  He was dealt to the Red Sox before the 1981 season, leaving the Angels with a 102-78 record with 1,233 Strikeouts.

Chuck Finley played most of his career with the Angels, beginning from being a First Round January Secondary Draft choice in 1985.  

The southpaw first made the Angels roster in 1986, and he came out of the bullpen for his first two years before becoming a part of California's roster in 1988.  Finley did not do well in his first year, but he was an All-Star the next two years with ERAs under 2.60 and at least 150 Strikeouts.

Finley would struggle in 1992, but he returned to ace status with the Angels, going to two more All-Star Games (1995 & 1996) and winning at least 10 Games from 1993 to 1999.  

Finley left the Angels when he signed with Cleveland as a Free Agent after the 1999 Season, and with the Halos, he had a 165-140 record with 2,151 Strikeouts.  He is, as of this writing, the all-time franchise leader in Wins and Innings Pitched (2,675) and is second in Strikeouts.

In 2009, Finley was inducted into the Angels' Hall of Fame.

Nolan Ryan was one of three players who the New York Mets traded to get Jim Fregosi.  With all due respect to Fregosi, his best years were behind him, and Ryan, however, was about to break out.

The Ryan Express came to California in 1972, where he went to his first All-Star Game and had first in leading the league in Strikeouts (32) and H/9 (5.3).  Eager to prove that it was no fluke, Ryan fanned 383 batters in 1973, one more than Sandy Koufax did in 1965, and breaking the modern mark.  Finishing second for the Cy Young that year, Ryan was third in Cy Young voting with 367 Ks, and his second straight 20 Win season.

After slipping in 1975, Ryan was back to being the most dominant flamethrower in baseball, leading the American League in Strikeouts annually from 1976 and 1979.  He was a five-time All-Star with the Angels, with a 138-121 record and 2,416 Strikeouts.

Ryan signed with the Houston Astros in 1979, and the native Texan stayed there until 1989, when he played for Texas for five years.  Ryan will always be most associated with those two teams, but it was what he did in California that he first showed that he was an elite Pitcher, and he had some of his best seasons there.

In 1992, the Angels inducted him into their Hall of Fame and retired his number 30.  Ryan entered the Angels Hall of Fame in 1992 and the Baseball Hall of Fame in 1999.